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Ankerite is a calcium, iron, magnesium, manganese carbonate mineral of the group of rhombohedral carbonates with formula: Ca(Fe,Mg,Mn)(CO3)2. In composition it is closely related to dolomite, but differs from this in having magnesium replaced by varying amounts of iron(II) and manganese. Forms series with dolomite and kutnohorite.
Industry:Geology; Mining
Arsenic is a chemical element with symbol As and atomic number 33. Arsenic occurs in many minerals, usually in conjunction with sulfur and metals, and also as a pure elemental crystal. It was first documented by Albertus Magnus in 1250. Arsenic is a metalloid. It can exist in various allotropes, although only the gray form has important use in industry.
Industry:Geology; Mining
The general formula for nambulite is (Li,Na)Mn4Si5O14(OH). It is named after the mineralogist, Professor Matsuo Nambu (born 1917) of Tohoko University, Japan, who is known for his research in manganese minerals. The mineral was first discovered in the Funakozawa Mine, northeastern Japan, a metasedimentary manganese ore.
Industry:Geology; Mining
Fluorcaphite is a mineral with the chemical formula (Ca,Sr,Ce,Na)5(PO4)3F. It is found in the Kola Peninsula in Russia. Its crystals are hexagonal to pyramidal. It is light to bright yellow and leaves a white streak. It is transparent and has a vitreous luster. It is rated 5 on the Mohs Scale. Fluorcaphite is radioactive.
Industry:Geology; Mining
Alunite is a hydrated aluminium potassium,sulfate mineral, formula KAl3(SO4)2(OH)6. It was first observed in the 15th century at Tolfa, near Rome, where it is mined for the manufacture of alum. First called aluminilite by J.C. Delamétherie in 1797, this name was contracted by François Beudant in 1824 to alunite.
Industry:Geology; Mining
Billietite is a uncommon mineral of Uranium that contains Barium. It has the chemical formula: Ba(UO2)6O4(OH)6•8H2O. It usually occurs as clear yellow orthorhombic crystals. Billietite is named after Valere Louis Billiet (1903-1944), Belgian crystallographer at the University of Ghent, Ghent, Belgium.
Industry:Geology; Mining
Fichtelite is a rare white mineral found in fossilized wood from Bavaria. It crystallizes in the monoclinic crystal system. It is a cyclic hydrocarbon dimethyl-isopropyl-perhydrophenanthrene, C19H34. It is very soft with a Mohs hardness of 1, the same as talc. Its specific gravity is very low at 1.032, just slightly denser than water.
Industry:Geology; Mining
Frankhawthorneite Cu2Te6+O4(OH)2 is a monoclinic copper tellurate mineral named after Prof. Frank Christopher Hawthorne (born 1946), University of Manitoba, Winnipeg, Canada. It was discovered at Centennial Eureka Mine, Tintic District, East Tintic Mountains, Juab County, Utah, in 1995. It has a leaf green color.
Industry:Geology; Mining
Thenardite is an anhydrous sodium sulfate mineral, Na2SO4 which occurs in arid evaporite environments. It also occurs in dry caves and old mine workings as an efflorescence and as a crusty deposit around fumaroles. It occurs in volcanic caves on Mt. Etna, Italy and was named after the French chemist, Louis Jacques Thénard (1777-1826).
Industry:Geology; Mining
Akdalaite is a very rare mineral found in Kazakhstan and has the formula 5Al2O3·H2O. It was formerly believed to be 4Al2O3·H2O. It is therefore the same as tohdite an artificially produced phase. Studies on the crystal structure and spectra indicate that this is an aluminium oxide hydroxide.
Industry:Geology; Mining
