Input interpretation
phoenicochroite (mineral)
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General properties
alternate names | chrominium | melanochroite | phenicochroite | phoenicite | scheibeite | subsesquichromate of lead formula | Pb_2(CrO_4)O discovery year | 1839
Basic properties
density | 7.01 g/cm^3 transparency | translucent birefringence | 0.27 luster | adamantine | resinous Mohs hardness | 2.5 streak | yellow orange magnetism | nonmagnetic color | dark red | lemon yellow molar mass | 546.4 g/mol (grams per mole)
Units
Mineral identifiers
Strunz ID | VI/F.02-40 Dana ID | 35.1.2.1 ICSD number | ICSD34831
Crystallographic properties
crystal system | monoclinic crystal class | 2/m unit cell volume | 513 Å^3 (cubic ångströms) d-spacing | 2.979 Å (ångströms) | 3.38 Å (ångströms) | 6.43 Å (ångströms) intensity | 100% | 100% | 50% molecules per unit cell | 4 molecules per cell 2V angle | π/3 radians≈60° (degrees) refractive indices | 2.38 | 0 | 0 | 0 | 0 | 0 dispersion | r > v | strong unit cell lengths | 14 Å (ångströms) | 5.675 Å (ångströms) | 7.137 Å (ångströms) unit cell angles | 90° (degrees) | 115.2° (degrees) | 90° (degrees)
Wikipedia summary
Phoenicochroite, also known as melanochroite, is a lead chromate mineral with formula Pb_2OCrO_4. It forms striking orange red crystals. It was first discovered in 1839 in Beryozovskoye deposit, Urals, Russia. It is named from the Greek word φοίυικος for "deep red" and χρόα for "color, " in allusion to its color.