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Breithauptite is a nickel antimonide mineral with the simple formula NiSb. Breithauptite is a metallic opaque copper-red mineral crystallizing in the hexagonal - dihexagonal dipyramidal crystal system. It is typically massive to reniform in habit, but is observed as tabular crystals. It has a Mohs hardness of 3.5 to 4 and a specific gravity of 8.23.
Industry:Geology; Mining
Fabianite is a borate mineral with the chemical formula CaB3O5(OH). It is colorless and leaves a white streak. Its crystals are monoclinic prismatic. It is transparent and fluorescent. It has vitreous luster. It is not radioactive. Fabianite is rated 6 on the Mohs Scale. It was named for Hans-Joachim Fabian, a German geologist.
Industry:Geology; Mining
Hyalophane or jaloallofane is a crystalline mineral, part of the feldspar group of tectosilicates. It is considered a barium-rich potassium feldspar. Its chemical formula is (K,Ba)(Al(Si,Al)Si2O8), and it has a hardness of 6 - 6½. The name hyalophane comes from the Greek hyalos, meaning "glass", and phanos meaning "to appear".
Industry:Geology; Mining
Spertiniite is a rare copper hydroxide mineral. Chemically it is copper(II) hydroxide with formula Cu(OH)2. It occurs as blue to blue green tabular orthorhombic crystal aggregates in a secondary alkaline environment altering chalcosite. Associated minerals include chalcocite, atacamite, native copper, diopside, grossular and vesuvianite.
Industry:Geology; Mining
The mineral anorthoclase ((Na,K)AlSi3O8) is a crystalline solid solution in the alkali feldspar series, in which the sodium-aluminium silicate member exists in larger proportion. It typically consists of between 10 and 36 percent of KAlSi3O8 and between 64 and 90 percent of NaAlSi3O8.
Industry:Geology; Mining
Alluaudite is a relatively common alkaline manganese iron phosphate mineral with formula (Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3, of secondary (metasomatic) origin, related with granitic pegmatites mainly. Named by Alexis Damour in 1847 after François Alluaud (II) (1778-1866).
Industry:Geology; Mining
Schäferite is a rare vanadate mineral with chemical formula Ca2NaMg2(VO4)3. Schäferite is isometric, which means that it has three axes of equal length and 90° angles between the axes. Schäferite is isotropic, meaning that the velocity of light is the same no matter which direction the light passes through.
Industry:Geology; Mining
Arsenoclasite (originally arsenoklasite) is a red or dark orange brown mineral with formula Mn5(AsO4)2(OH)4. The name comes from the Greek words αρσενικόν (for arsenic) and κλάσις (for cleavage), as arsenoclasite contains arsenic and has perfect cleavage. The mineral was discovered in 1931 in Långban, Sweden.
Industry:Geology; Mining
Pectolite is a white to gray mineral, NaCa2Si3O8(OH), sodium calcium inosilicate hydroxide. It crystallizes in the triclinic system typically occurring in radiated or fibrous crystalline masses. It has a Mohs hardness of 4.5 to 5 and a specific gravity of 2.7 to 2.9. The gemstone variety, larimar, is a pale to sky blue.
Industry:Geology; Mining
Allabogdanite is a very rare phosphide mineral with formula (Fe,Ni)2P, found in 1997 in a meteorite. It was described for an occurrence in the Onello meteorite in the Onello River basin, Sakha Republic; Yakutia, Russia; associated with taenite, schreibersite, kamacite, graphite and awaruite. It was named for Russian geologist Alla Bogdanova.
Industry:Geology; Mining
