Aplowite
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Aplowite is a very rare mineral with the formula CoSO4•4H2O, a naturally occurring cobalt(II) sulfate tetrahydrate. It is the lower hydrate when compared to bieberite (heptahydrate) and moorhouseite (hexahydrate), and a higher hydrate when compared to cobaltkieserite (monohydrate). It occurs together with moorhouseite within efflorescences.[2][3]
Aplowite on a cobaltite crystal | |
| General | |
|---|---|
| Category | Rozenite |
| Formula | (Co,Mn,Ni)SO4 · 4H2O |
| IMA symbol | Apw[1] |
| Crystal system | monoclinic |
| Crystal class | Prismatic - 2/m |
| Identification | |
| Color | bright pink, light pink in light |
| Mohs scale hardness | 3 |
| Luster | Vitreous (Glassy) |
| Streak | white |
| Diaphaneity | transparent |
| Density | 2.33 g/cm3 (Measured) 2.36 g/cm3 (Calculated) |
| Optical properties | Biaxial (–). α = 1.528 β = n.d. γ = 1.536 |
| 2V angle | n.d. |
| Solubility | soluble in water |
| References | [2] |