Input interpretation
ferberite (mineral)
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General properties
alternate names | ferrotungstate | iron tungstate formula | Fe^(2+)WO_4 discovery year | 1863
Basic properties
density | 7.45 g/cm^3 transparency | opaque birefringence | 0.159 luster | adamantine | metallic | submetallic Mohs hardness | 4.25 tenacity | brittle streak | brownish black magnetism | nonmagnetic color | black fracture | brittle | uneven molar mass | 303.7 g/mol (grams per mole)
Units
Mineral identifiers
Strunz ID | IV/D.16-20 Dana ID | 48.1.1.2 ICSD number | ICSD64733
Crystallographic properties
crystal system | monoclinic crystal class | 2/m unit cell volume | 133 Å^3 (cubic ångströms) d-spacing | 2.941 Å (ångströms) | 4.75 Å (ångströms) | 3.752 Å (ångströms) intensity | 100% | 45% | 35% molecules per unit cell | 2 molecules per cell 2V angle | 7 π/18 radians≈70° (degrees) refractive indices | 2.255 | 0 | 0 | 0 | 0 | 0 dispersion | r > v | strong unit cell lengths | 4.76 Å (ångströms) | 5.68 Å (ångströms) | 4.92 Å (ångströms) unit cell angles | 90° (degrees) | 90.02° (degrees) | 90° (degrees)
Wikipedia summary
Ferberite is the iron endmember of the manganese - iron wolframite solid solution series. The manganese endmember is hübnerite. Ferberite is a black monoclinic mineral composed of iron(II) tungstate, FeWO_4.