Pascoite
A variety of Minerals
What is Pascoite?
Crystals of pascoite, which occur in granular crusts, are minute and lath-like with oblique terminations. The mineral is dark red-orange to yellow-orange in color and dirty yellow when partially dehydrated. It occurs as efflorescences in mine tunnels or as a product leached out of surficial vanadium oxides by ground water. Pascoite has been found in association with carnotite. Pascoite melts readily to form a deep red liquid. Pascoite is a member of the eponymous pascoite group. The magnesium analogue of pascoite is magnesiopascoite.
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Key Characteristics
Composition of Pascoite
A 2005 study determined that pascoite has a C 2/m disordered crystal structure. It consists of decavanadate anions (V10O28) linked together by the interstitial complex {Ca3(H2O)17}.
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Quick Facts
Physical Properties
- Color
- Dark red-orange to yellow-orange; dirty yellow (upon partial dehydration).
- Hardness (Mohs)
- 2.5
- Density
- 2.465 g/cm³
- Streak
- Cadmium-yellow
Chemical Properties
- Chemical Formula
- Ca3(V10O28) · 17H2O
- Elements
- Ca, H, O, V
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