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10 relations: George Perkins Merrill, Hermann–Mauguin notation, Hexagonal crystal family, International Mineralogical Association, Martian meteorite, Moon rock, Pallasite, Phosphate minerals, Pultusk (meteorite), Whitlockite.
George Perkins Merrill
George Perkins Merrill (May 31, 1854 in Auburn, Maine – August 15, 1929 in Auburn, Maine) was an American geologist, notable as the head curator from 1917 to 1929 of the Department of Geology, United States National Museum (now the National Museum of Natural History of the Smithsonian Institution).
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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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Hexagonal crystal family
In crystallography, the hexagonal crystal family is one of the 6 crystal families, which includes 2 crystal systems (hexagonal and trigonal) and 2 lattice systems (hexagonal and rhombohedral).
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International Mineralogical Association
The International Mineralogical Association (IMA) is an international group of 38 national societies.
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Martian meteorite
A Martian meteorite is a rock that formed on the planet Mars and was then ejected from Mars by the impact of an asteroid or comet, and finally landed on the Earth.
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Moon rock
Moon rock or lunar rock is rock that is found on the Earth's moon, or lunar material collected during the course of human exploration of the Moon.
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Pallasite
The pallasites are a class of stony–iron meteorite.
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Phosphate minerals
Phosphate minerals are those minerals that contain the tetrahedrally coordinated phosphate (PO43−) anion along with the freely substituting arsenate (AsO43−) and vanadate (VO43−).
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Pultusk (meteorite)
Pultusk is an H5 ordinary chondrite meteorite which fell on 30 January 1868 in Poland.
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Whitlockite
Whitlockite is a mineral, an unusual form of calcium phosphate.
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