Input interpretation
zykaite (mineral)
General properties
formula | Fe^(3+)_4(AsO_4)_3(SO_4)(OH)·15(H_2O) discovery year | 1978
Basic properties
density | 2.5 g/cm^3 transparency | translucent birefringence | 0.014 luster | dull Mohs hardness | 2 streak | white magnetism | nonmagnetic color | greenish white | gray white fracture | uneven molar mass | 1023 g/mol (grams per mole)
Units
Mineral identifiers
Strunz ID | VII/D.05-60 Dana ID | 43.5.3.2 IMA number | IMA1976-039
Crystallographic properties
crystal system | orthorhombic unit cell volume | 5425 Å^3 (cubic ångströms) d-spacing | 10.4 Å (ångströms) | 10.6 Å (ångströms) | 6.92 Å (ångströms) intensity | 100% | 70% | 40% molecules per unit cell | 8 molecules per cell 2V angle | 61 π/180 radians≈61° (degrees) refractive indices | 1.632 | 1.636 | 1.646 | 0 | 0 | 0 dispersion | strong | weak unit cell lengths | 20.85 Å (ångströms) | 7.033 Å (ångströms) | 36.99 Å (ångströms) unit cell angles | 90° (degrees) | 90° (degrees) | 90° (degrees)
Wikipedia summary
Zykaite or zýkaite is a grey-white mineral consisting of arsenic, hydrogen, iron, sulfur and oxygen with formula: Fe^(3 + )_4(AsO_4)_3(SO_4)(OH)·15(H_2O). This dull mineral is very soft with a Mohs hardness of only 2 and a specific gravity of 2.5. It is translucent and crystallizes in the orthorhombic crystal system.