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115 relations: Acicular (crystal habit), Akaigawa, Hokkaido, Algarve, Austria, Bahia, Bakal mine, Barium, Birefringence, Birnessite, Blowpipe (tool), Brazil, Calcite, Calcium, Cambridge, Massachusetts, Cape Province, Carinthia, Chlorine, Cleavage (crystal), Cobalt, Concretion, Copper, Country rock, Cryptomelane, Crystal habit, Crystal twinning, Crystallite, Cuba, Diamond, Druse (geology), Electron microscope, Fault (geology), Feldspar, Ferromanganese nodules, Fracture (geology), Franklinite, Fusibility, Harvard Mineralogical Museum, Hüttenberg, Austria, Hermann–Mauguin notation, Hokkaido, Hollandite, Hot spring, Hotazel, Hydrochloric acid, Hydrostatic weighing, Iron, Japan, Jasper, Kuruman, Lattice constant, ..., Lead, Limestone, Lustre (mineralogy), Magnesium, Manganese, Manganese dioxide, Manganese nodule, Manganese oxide, Manganese(II) carbonate, Manganite, Mariana Islands, Metamorphism, Mohs scale of mineral hardness, Monoclinic crystal system, New Jersey, Nickel, Nitric acid, Oceanic basin, Octahedron, Olivine, Optic axis of a crystal, Oriente Province, Orthorhombic crystal system, Oxygen, Pacific Ocean, Petrographic microscope, Phosphorus, Pleochroism, Polarization (waves), Portugal, Potassium, Prism (geometry), Properties of water, Psilomelane, Pyrolusite, Pyroxene, Quartz, Redox, Refractive index, Relative density, Rhodochrosite, Romanèchite, Rutile, Saipan, Shiribeshi Province, Silicate minerals, Silicon dioxide, Silver, Sodium, South Africa, Specific gravity, Spessartine, Stalactite, Sterling Hill Mining Museum, Streak (mineralogy), Sulfuric acid, Supergene (geology), Transparency and translucency, Tuff, Type locality (geology), Type specimen (mineralogy), Urandi, Vein (geology), Willemite, X-ray scattering techniques. Expand index (65 more) »
Acicular (crystal habit)
Acicular, in mineralogy, refers to a crystal habit composed of slender, needle-like crystals.
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Akaigawa, Hokkaido
is a village located in Shiribeshi, Hokkaido, Japan.
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Algarve
The Algarve (from الغرب "the west") is the southernmost region of continental Portugal.
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Austria
Austria (Österreich), officially the Republic of Austria (Republik Österreich), is a federal republic and a landlocked country of over 8.8 million people in Central Europe.
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Bahia
Bahia (locally) is one of the 26 states of Brazil and is located in the northeastern part of the country on the Atlantic coast.
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Bakal mine
The Bakal mine is a large iron mine located in western Russia in the Chelyabinsk Oblast.
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Barium
Barium is a chemical element with symbol Ba and atomic number 56.
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Birefringence
Birefringence is the optical property of a material having a refractive index that depends on the polarization and propagation direction of light.
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Birnessite
Birnessite (Na0.3Ca0.1K0.1)(Mn4+,Mn3+)2O4 · 1.5 H2O is an oxide mineral of manganese along with calcium, potassium and sodium.
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Blowpipe (tool)
The term blowpipe refers to one of several tools used to direct streams of gases into any of several working media.
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Brazil
Brazil (Brasil), officially the Federative Republic of Brazil (República Federativa do Brasil), is the largest country in both South America and Latin America.
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Calcite
Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3).
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Calcium
Calcium is a chemical element with symbol Ca and atomic number 20.
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Cambridge, Massachusetts
Cambridge is a city in Middlesex County, Massachusetts, and part of the Boston metropolitan area.
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Cape Province
The Province of the Cape of Good Hope (Provinsie van die Kaap die Goeie Hoop), commonly referred to as the Cape Province (Kaapprovinsie) and colloquially as The Cape (Die Kaap), was a province in the Union of South Africa and subsequently the Republic of South Africa.
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Carinthia
No description.
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Chlorine
Chlorine is a chemical element with symbol Cl and atomic number 17.
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Cleavage (crystal)
Cleavage, in mineralogy, is the tendency of crystalline materials to split along definite crystallographic structural planes.
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Cobalt
Cobalt is a chemical element with symbol Co and atomic number 27.
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Concretion
A concretion is a hard, compact mass of matter formed by the precipitation of mineral cement within the spaces between particles, and is found in sedimentary rock or soil.
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Copper
Copper is a chemical element with symbol Cu (from cuprum) and atomic number 29.
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Country rock
Country rock is a subgenre of popular music, formed from the fusion of rock and country.
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Cryptomelane
Cryptomelane is a potassium manganese oxide mineral with formula K(Mn4+,Mn2+)8O16.
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Crystal habit
In mineralogy, crystal habit is the characteristic external shape of an individual crystal or crystal group.
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Crystal twinning
Crystal twinning occurs when two separate crystals share some of the same crystal lattice points in a symmetrical manner.
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Crystallite
A crystallite is a small or even microscopic crystal which forms, for example, during the cooling of many materials.
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Cuba
Cuba, officially the Republic of Cuba, is a country comprising the island of Cuba as well as Isla de la Juventud and several minor archipelagos.
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Diamond
Diamond is a solid form of carbon with a diamond cubic crystal structure.
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Druse (geology)
In geology, druse, also known as drusy or druzy, refers to a coating of fine crystals on a rock fracture surface, vein or within a vug or geode.
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Electron microscope
An electron microscope is a microscope that uses a beam of accelerated electrons as a source of illumination.
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Fault (geology)
In geology, a fault is a planar fracture or discontinuity in a volume of rock, across which there has been significant displacement as a result of rock-mass movement.
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Feldspar
Feldspars (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8) are a group of rock-forming tectosilicate minerals that make up about 41% of the Earth's continental crust by weight.
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Ferromanganese nodules
Ferromanganese nodules form in the oxidizing environment of the abyssal pelagic zone.
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Fracture (geology)
A fracture is any separation in a geologic formation, such as a joint or a fault that divides the rock into two or more pieces.
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Franklinite
Franklinite is an oxide mineral belonging to the normal spinel subgroup's iron (Fe) series, with the formula ZnFe3+2O4.
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Fusibility
The fusibility of a material is the ease at which the material can be fused together or to the temperature or amount of heat required to melt a material.
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Harvard Mineralogical Museum
The Mineralogical and Geological Museum at Harvard, or the Harvard Mineralogical Museum short form of the name, is located on the campus of Harvard University in Cambridge, Massachusetts.
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Hüttenberg, Austria
Hüttenberg (Železni hrib) is a market town in the district of Sankt Veit an der Glan in the Austrian state of Carinthia.
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Hermann–Mauguin notation
In geometry, Hermann–Mauguin notation is used to represent the symmetry elements in point groups, plane groups and space groups.
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Hokkaido
(), formerly known as Ezo, Yezo, Yeso, or Yesso, is the second largest island of Japan, and the largest and northernmost prefecture.
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Hollandite
Hollandite (chemical formula: Ba(Mn4+6Mn3+2)O16) is an oxide mineral.
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Hot spring
A hot spring is a spring produced by the emergence of geothermally heated groundwater that rises from the Earth's crust.
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Hotazel
Hotazel is a town in John Taolo Gaetsewe District Municipality in the Northern Cape province of South Africa.
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Hydrochloric acid
Hydrochloric acid is a colorless inorganic chemical system with the formula.
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Hydrostatic weighing
Hydrostatic weighing, also referred to as "underwater weighing", "hydrostatic body composition analysis", and "hydrodensitometry" is a technique for measuring the mass per unit volume of a living person's body.
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Iron
Iron is a chemical element with symbol Fe (from ferrum) and atomic number 26.
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Japan
Japan (日本; Nippon or Nihon; formally 日本国 or Nihon-koku, lit. "State of Japan") is a sovereign island country in East Asia.
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Jasper
Jasper, an aggregate of microgranular quartz and/or chalcedony and other mineral phases,Kostov, R. I. 2010.
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Kuruman
Kuruman is a town with just over 13,000 inhabitants in the Northern Cape province of South Africa.
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Lattice constant
The lattice constant, or lattice parameter, refers to the physical dimension of unit cells in a crystal lattice.
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Lead
Lead is a chemical element with symbol Pb (from the Latin plumbum) and atomic number 82.
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Limestone
Limestone is a sedimentary rock, composed mainly of skeletal fragments of marine organisms such as coral, forams and molluscs.
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Lustre (mineralogy)
Lustre or luster is the way light interacts with the surface of a crystal, rock, or mineral.
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Magnesium
Magnesium is a chemical element with symbol Mg and atomic number 12.
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Manganese
Manganese is a chemical element with symbol Mn and atomic number 25.
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Manganese dioxide
Manganese(IV) oxide is the inorganic compound with the formula.
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Manganese nodule
Polymetallic nodules, also called manganese nodules, are rock concretions on the sea bottom formed of concentric layers of iron and manganese hydroxides around a core.
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Manganese oxide
Manganese oxide is any of a variety of manganese oxides and hydroxides.
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Manganese(II) carbonate
Manganese carbonate is a compound with the chemical formula MnCO3.
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Manganite
Manganite is a mineral composed of manganese oxide-hydroxide, MnO(OH), crystallizing in the monoclinic system (pseudo-orthorhombic).
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Mariana Islands
The Mariana Islands (also the Marianas) are a crescent-shaped archipelago comprising the summits of fifteen mostly dormant volcanic mountains in the western North Pacific Ocean, between the 12th and 21st parallels north and along the 145th meridian east.
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Metamorphism
Metamorphism is the change of minerals or geologic texture (distinct arrangement of minerals) in pre-existing rocks (protoliths), without the protolith melting into liquid magma (a solid-state change).
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Mohs scale of mineral hardness
The Mohs scale of mineral hardness is a qualitative ordinal scale characterizing scratch resistance of various minerals through the ability of harder material to scratch softer material.
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Monoclinic crystal system
In crystallography, the monoclinic crystal system is one of the 7 crystal systems.
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New Jersey
New Jersey is a state in the Mid-Atlantic region of the Northeastern United States.
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Nickel
Nickel is a chemical element with symbol Ni and atomic number 28.
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Nitric acid
Nitric acid (HNO3), also known as aqua fortis (Latin for "strong water") and spirit of niter, is a highly corrosive mineral acid.
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Oceanic basin
In hydrology, an oceanic basin may be anywhere on Earth that is covered by seawater but geologically ocean basins are large geologic basins that are below sea level.
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Octahedron
In geometry, an octahedron (plural: octahedra) is a polyhedron with eight faces, twelve edges, and six vertices.
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Olivine
The mineral olivine is a magnesium iron silicate with the formula (Mg2+, Fe2+)2SiO4.
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Optic axis of a crystal
An optic axis of a crystal is a direction in which a ray of transmitted light suffers no birefringence (double refraction).
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Oriente Province
Oriente (Spanish for "East" or "Orient") was one of six provinces of Cuba until 1976.
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Orthorhombic crystal system
In crystallography, the orthorhombic crystal system is one of the 7 crystal systems.
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Oxygen
Oxygen is a chemical element with symbol O and atomic number 8.
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Pacific Ocean
The Pacific Ocean is the largest and deepest of Earth's oceanic divisions.
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Petrographic microscope
A petrographic microscope is a type of optical microscope used in petrology and optical mineralogy to identify rocks and minerals in thin sections.
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Phosphorus
Phosphorus is a chemical element with symbol P and atomic number 15.
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Pleochroism
Pleochroism (from Greek πλέων, pléōn, "more" and χρῶμα, khrôma, "color") is an optical phenomenon in which a substance has different colors when observed at different angles, especially with polarized light.
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Polarization (waves)
Polarization (also polarisation) is a property applying to transverse waves that specifies the geometrical orientation of the oscillations.
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Portugal
Portugal, officially the Portuguese Republic (República Portuguesa),In recognized minority languages of Portugal: Portugal is the oldest state in the Iberian Peninsula and one of the oldest in Europe, its territory having been continuously settled, invaded and fought over since prehistoric times.
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Potassium
Potassium is a chemical element with symbol K (from Neo-Latin kalium) and atomic number 19.
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Prism (geometry)
In geometry, a prism is a polyhedron comprising an n-sided polygonal base, a second base which is a translated copy (rigidly moved without rotation) of the first, and n other faces (necessarily all parallelograms) joining corresponding sides of the two bases.
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Properties of water
Water is a polar inorganic compound that is at room temperature a tasteless and odorless liquid, which is nearly colorless apart from an inherent hint of blue. It is by far the most studied chemical compound and is described as the "universal solvent" and the "solvent of life". It is the most abundant substance on Earth and the only common substance to exist as a solid, liquid, and gas on Earth's surface. It is also the third most abundant molecule in the universe. Water molecules form hydrogen bonds with each other and are strongly polar. This polarity allows it to separate ions in salts and strongly bond to other polar substances such as alcohols and acids, thus dissolving them. Its hydrogen bonding causes its many unique properties, such as having a solid form less dense than its liquid form, a relatively high boiling point of 100 °C for its molar mass, and a high heat capacity. Water is amphoteric, meaning that it is both an acid and a base—it produces + and - ions by self-ionization.
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Psilomelane
Psilomelane is a group name for hard black manganese oxides including hollandite and romanechite.
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Pyrolusite
Pyrolusite is a mineral consisting essentially of manganese dioxide (MnO2) and is important as an ore of manganese.
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Pyroxene
The pyroxenes (commonly abbreviated to Px) are a group of important rock-forming inosilicate minerals found in many igneous and metamorphic rocks.
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Quartz
Quartz is a mineral composed of silicon and oxygen atoms in a continuous framework of SiO4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO2.
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Redox
Redox (short for reduction–oxidation reaction) (pronunciation: or) is a chemical reaction in which the oxidation states of atoms are changed.
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Refractive index
In optics, the refractive index or index of refraction of a material is a dimensionless number that describes how light propagates through that medium.
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Relative density
Relative density, or specific gravity, is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material.
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Rhodochrosite
Rhodochrosite is a manganese carbonate mineral with chemical composition MnCO3.
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Romanèchite
Romanèchite ((Ba,H2O)2(Mn+4,Mn+3)5O10) is the primary constituent of psilomelane, which is a mixture of minerals.
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Rutile
Rutile is a mineral composed primarily of titanium dioxide (TiO2).
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Saipan
Saipan (formerly in Spanish: Saipán) is the largest island of the Northern Mariana Islands, a commonwealth of the United States in the western Pacific Ocean.
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Shiribeshi Province
was a short-lived province in Hokkaidō.
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Silicate minerals
Silicate minerals are rock-forming minerals with predominantly silicate anions.
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Silicon dioxide
Silicon dioxide, also known as silica (from the Latin silex), is an oxide of silicon with the chemical formula, most commonly found in nature as quartz and in various living organisms.
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Silver
Silver is a chemical element with symbol Ag (from the Latin argentum, derived from the Proto-Indo-European ''h₂erǵ'': "shiny" or "white") and atomic number 47.
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Sodium
Sodium is a chemical element with symbol Na (from Latin natrium) and atomic number 11.
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South Africa
South Africa, officially the Republic of South Africa (RSA), is the southernmost country in Africa.
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Specific gravity
Specific gravity is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume.
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Spessartine
Spessartine, sometimes mistakenly referred to as spessartite, is a nesosilicate, manganese aluminium garnet species, Mn2+3Al2(SiO4)3.Gemological Institute of America, GIA Gem Reference Guide 1995, The mineral spessartine should not be confused with a type of igneous rock (a lamprophyre) called spessartite. Spessartine's name is a derivative of Spessart in Bavaria, Germany, the type locality of the mineral. It occurs most often in granite pegmatite and allied rock types and in certain low-grade metamorphic phyllites. Sources include Australia, Myanmar, India, Afghanistan, Israel, Madagascar, Tanzania and the United States. Spessartine of an orange-yellow has been called Mandarin garnet and is found in Madagascar. Violet-red spessartines are found in rhyolites in Colorado and Maine. In Madagascar, spessartines are exploited either in their bedrock or in alluvium. The orange garnets result from sodium-rich pegmatites. Spessartines are found in bedrock in the highlands in the Sahatany valley. Those in alluvium are generally found in southern Madagascar or in the Maevatanana region. Spessartine forms a solid solution series with the garnet species almandine. Well-formed crystals from this series, varying in color from very dark-red to bright yellow-orange, were found in Latinka, Rhodope Mountains, Kardzhali Province, Bulgaria. Spessartine, like the other garnets, always occurs as a blend with other species. Gems with high spessartine content tend toward a light orange hue, while almandine prevalence induces red or brownish hues.
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Stalactite
A stalactite (from the Greek stalasso, (σταλάσσω), "to drip", and meaning "that which drips") is a type of formation that hangs from the ceiling of caves, hot springs, or manmade structures such as bridges and mines.
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Sterling Hill Mining Museum
The Sterling Hill Mine, now known as the Sterling Hill Mine Tour & Museum of Fluorescence, is a former iron and zinc mine in Ogdensburg, Sussex County, New Jersey, United States.
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Streak (mineralogy)
The streak (also called "powder color") of a mineral is the color of the powder produced when it is dragged across an un-weathered surface.
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Sulfuric acid
Sulfuric acid (alternative spelling sulphuric acid) is a mineral acid with molecular formula H2SO4.
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Supergene (geology)
In ore deposit geology, supergene processes or enrichment are those that occur relatively near the surface as opposed to deep hypogene processes.
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Transparency and translucency
In the field of optics, transparency (also called pellucidity or diaphaneity) is the physical property of allowing light to pass through the material without being scattered.
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Tuff
Tuff (from the Italian tufo) is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption.
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Type locality (geology)
Type locality, also called type area, type site, or type section, is the locality where a particular rock type, stratigraphic unit or mineral species is first identified.
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Type specimen (mineralogy)
In mineralogy, the type specimen, also known as type material, is a reference sample by which a mineral is defined.
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Urandi
Urandi is a municipality in the state of Bahia in the North-East region of Brazil.
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Vein (geology)
In geology, a vein is a distinct sheetlike body of crystallized minerals within a rock.
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Willemite
Willemite is a zinc silicate mineral (Zn2SiO4) and a minor ore of zinc.
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X-ray scattering techniques
X-ray scattering techniques are a family of non-destructive analytical techniques which reveal information about the crystal structure, chemical composition, and physical properties of materials and thin films.
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References
[1] https://en.wikipedia.org/wiki/Todorokite
