General Information:
Chemical Formula:
Fe+++AsO4·3.5(H2O)
Composition:
(Molecular Weight = 257.82 gm)
Iron 21.66 % Fe
Arsenic 29.06 % As
Hydrogen 2.74 % H
Oxygen 46.54 % O
Empirical Formula:
Fe3+(AsO4)·3.5(H2O)
Environment:
Found on the old (1200-1400) mine dumps.
IMA Status:
Approved IMA 1976
Locality:
Kank, Kutno Hora district, Stredocesky Kraj, Bohemia, Czech Republic.
Name Origin:
Named for the locality.
Physical Properties:
Color:
yellow green.
Density:
2.7
Habits:
Botryoidal - "Grape-like" rounded forms (e.g.. malachite)., Encrustations - Forms crust-like aggregates on matrix.,
Hardness:
2-3 - Gypsum-Calcite
Luster:
Vitreous - Dull
More details...