Yavapaiite

General Information:
 Chemical Formula:
KFe+++(SO4)2
 Composition:
(Molecular Weight = 287.07 gm)
Potassium 13.62 % K 
Iron 19.45 % Fe
Sulfur 22.34 % S 
Oxygen 44.59 % O 
 Empirical Formula:
KFe3+(SO4)2
 Environment:
Crystal aggregates coating rubble with other secondary sulfates.
 IMA Status:
Approved IMA 1959
 Locality:
United Verde Extension mine, Jerome, Arizona, USA.
 Name Origin:
Named for the Yavapai Indian tribe that inhabited the area of Arizona where the mineral was found.
Physical Properties:
 Cleavage:
[001] Perfect, [100] Perfect, [110] Distinct
 Color:
light pink.
 Density:
2.88
 Diaphaniety:
Transparent
 Habits:
Acicular - Occurs as needle-like crystals., Microscopic Crystals - Crystals visible only with microscopes.,
 Hardness:
2.5-3 - Finger Nail-Calcite
 Luster:
Vitreous (Glassy)
 Streak:
yellow white
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