51 relations: Abhurite, Alunite, Antimony, Apatite, Benitoite, Beryl, Bismuth, Boric acid, Bravais lattice, Calcite, Cancrinite, Centrosymmetry, Cerite, Chirality (chemistry), Cinnabar, Close-packing of equal spheres, Corundum, Coxeter notation, Crystal, Crystal structure, Crystal system, Crystallographic point group, Crystallography, Ditrigonal polyhedron, Dolomite, Graphite, Greenockite, Hematite, Hermann–Mauguin notation, Hexagon, Ilmenite, Jarosite, Kalsilite, Lithium tantalate, Mineral, Nepheline, Orbifold notation, Pearson symbol, Point group, Polar point group, Prism (geometry), Quartz, Rhombohedron, Rhombus, Schoenflies notation, Space group, Springer Science+Business Media, Tourmaline, Vanadinite, Wurtzite, ..., Wurtzite crystal structure. Expand index (1 more) » « Shrink index
Abhurite is a mineral of tin, oxygen, hydrogen, and chlorine with the formula Sn21O6(OH)14Cl16 or Sn3O(OH)2Cl2.
Alunite is a hydrated aluminium potassium sulfate mineral, formula KAl3(SO4)2(OH)6.
Antimony is a chemical element with symbol Sb (from stibium) and atomic number 51.
Apatite is a group of phosphate minerals, usually referring to hydroxylapatite, fluorapatite and chlorapatite, with high concentrations of OH−, F− and Cl− ions, respectively, in the crystal.
Benitoite is a rare blue barium titanium silicate mineral, found in hydrothermally altered serpentinite.
Beryl is a mineral composed of beryllium aluminium cyclosilicate with the chemical formula Be3Al2(SiO3)6.
Bismuth is a chemical element with symbol Bi and atomic number 83.
Boric acid, also called hydrogen borate, boracic acid, orthoboric acid and acidum boricum, is a weak, monobasic Lewis acid of boron, which is often used as an antiseptic, insecticide, flame retardant, neutron absorber, or precursor to other chemical compounds.
In geometry and crystallography, a Bravais lattice, named after, is an infinite array of discrete points in three dimensional space generated by a set of discrete translation operations described by: where ni are any integers and ai are known as the primitive vectors which lie in different directions and span the lattice.
Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3).
Cancrinite is a complex carbonate and silicate of sodium, calcium and aluminium with the formula Na6Ca2·2H2O.
In crystallography, a point group which contains an inversion center as one of its symmetry elements is centrosymmetric.
Cerite is a complex silicate mineral group containing cerium, formula (Ce,La,Ca)9(Mg,Fe+3)(SiO4)6(SiO3OH)(OH)3.
Chirality is a geometric property of some molecules and ions.
Cinnabar and cinnabarite, likely deriving from the κιννάβαρι (kinnabari), refer to the common bright scarlet to brick-red form of mercury(II) sulfide (HgS) that is the most common source ore for refining elemental mercury, and is the historic source for the brilliant red or scarlet pigment termed vermilion and associated red mercury pigments.
In geometry, close-packing of equal spheres is a dense arrangement of congruent spheres in an infinite, regular arrangement (or lattice).
Corundum is a crystalline form of aluminium oxide typically containing traces of iron, titanium, vanadium and chromium.
In geometry, Coxeter notation (also Coxeter symbol) is a system of classifying symmetry groups, describing the angles between with fundamental reflections of a Coxeter group in a bracketed notation expressing the structure of a Coxeter-Dynkin diagram, with modifiers to indicate certain subgroups.
A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.
In crystallography, crystal structure is a description of the ordered arrangement of atoms, ions or molecules in a crystalline material.
In crystallography, the terms crystal system, crystal family and lattice system each refer to one of several classes of space groups, lattices, point groups or crystals.
In crystallography, a crystallographic point group is a set of symmetry operations, like rotations or reflections, that leave a central point fixed while moving other directions and faces of the crystal to the positions of features of the same kind.
Crystallography is the experimental science of determining the arrangement of atoms in crystalline solids (see crystal structure).
In geometry, there are seven uniform and uniform dual polyhedra named as ditrigonal.
Dolomite is an anhydrous carbonate mineral composed of calcium magnesium carbonate, ideally The term is also used for a sedimentary carbonate rock composed mostly of the mineral dolomite.
Graphite, archaically referred to as plumbago, is a crystalline allotrope of carbon, a semimetal, a native element mineral, and a form of coal.
Greenockite is a rare cadmium bearing metal sulfide mineral consisting of cadmium sulfide (CdS) in crystalline form.
Hematite, also spelled as haematite, is the mineral form of iron(III) oxide (Fe2O3), one of several iron oxides.
In geometry, Hermann–Mauguin notation is used to represent the symmetry elements in point groups, plane groups and space groups.
In geometry, a hexagon (from Greek ἕξ hex, "six" and γωνία, gonía, "corner, angle") is a six-sided polygon or 6-gon.
Ilmenite, also known as Manaccanite, is a titanium-iron oxide mineral with the idealized formula.
Jarosite is a basic hydrous sulfate of potassium and iron with a chemical formula of KFe3+3(OH)6(SO4)2.
Kalsilite (KAlSiO4) is a vitreous white to grey feldspathoidal mineral that is found in some potassium-rich lavas, such as from Chamengo Crater in Uganda.
Lithium tantalate (LiTaO3) is a perovskite which possesses unique optical, piezoelectric and pyroelectric properties which make it valuable for nonlinear optics, passive infrared sensors such as motion detectors, terahertz generation and detection, surface acoustic wave applications, cell phones and possibly pyroelectric nuclear fusion.
A mineral is a naturally occurring chemical compound, usually of crystalline form and not produced by life processes.
Not to be confused with Nephrite. Nepheline, also called nephelite (from Greek: νεφέλη, "cloud"), is a feldspathoid: a silica-undersaturated aluminosilicate, Na3KAl4Si4O16, that occurs in intrusive and volcanic rocks with low silica, and in their associated pegmatites.
In geometry, orbifold notation (or orbifold signature) is a system, invented by William Thurston and popularized by the mathematician John Conway, for representing types of symmetry groups in two-dimensional spaces of constant curvature.
The Pearson symbol, or Pearson notation, is used in crystallography as a means of describing a crystal structure, and was originated by W.B. Pearson.
In geometry, a point group is a group of geometric symmetries (isometries) that keep at least one point fixed.
In geometry, a polar point group is a point group in which there is more than one point that every symmetry operation leaves unmoved.
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.
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.
In geometry, a rhombohedron is a three-dimensional figure like a cube, except that its faces are not squares but rhombi.
In plane Euclidean geometry, a rhombus (plural rhombi or rhombuses) is a simple (non-self-intersecting) quadrilateral whose four sides all have the same length.
The Schoenflies (or Schönflies) notation, named after the German mathematician Arthur Moritz Schoenflies, is one of two conventions commonly used to describe point groups.
In mathematics, physics and chemistry, a space group is the symmetry group of a configuration in space, usually in three dimensions.
Springer Science+Business Media or Springer, part of Springer Nature since 2015, is a global publishing company that publishes books, e-books and peer-reviewed journals in science, humanities, technical and medical (STM) publishing.
Tourmaline is a crystalline boron silicate mineral compounded with elements such as aluminium, iron, magnesium, sodium, lithium, or potassium.
Vanadinite is a mineral belonging to the apatite group of phosphates, with the chemical formula Pb5(VO4)3Cl.
Wurtzite is a zinc iron sulfide mineral ((Zn,Fe)S) a less frequently encountered mineral form of sphalerite.
General hexagonal crystal structure The wurtzite crystal structure, named after the mineral wurtzite, is a crystal structure for various binary compounds.
Hexagonal (crystal system), Hexagonal System, Hexagonal crystal system, Hexagonal lattice system, Hexagonal symmetry, Hexagonal system, Rhombohedral, Rhombohedral Microcrystalline, Rhombohedral crystal system, Rhombohedral lattice, Rhombohedral lattice system, Rhombohedral symmetry, Rhombohedral system, Rhombohedrality, Rhombohedrally, Rhombohedric, Trigonal, Trigonal System, Trigonal crystal system, Trigonal mineral, Trigonal symmetry, Trigonal system, Trigonality.