Pentagonite

Photo: Robert M. Lavinsky · CC BY-SA 3.0

Pentagonite

Ca(VO)Si₄O₁₀ * 4H₂O

Calcium vanadium phyllosilicate mineral

Properties

Chemical formula
Ca(VO)Si₄O₁₀ * 4H₂O
Group
Silicates
Crystal system
Orthorhombic
Hardness (Mohs)
Color
Green
Luster
Streak
Density
Cleavage
Fracture
Tenacity
Crystal habit
Transparency
Space group
Fluorescence
Magnetism
Radioactivity
Refractive index
Optical character
Birefringence
Pleochroism
Strunz classification
9.EA.55
Dana classification
IMA status
Approved mineral and/or valid name (A)
IMA symbol
Ptg
Locality
🇺🇸 Owyhee Dam
Type locality
Discovery year

Etymology

Named after angle

Source: Wikidata

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