Pentagonite

Pentagonite is a rare silicate mineral with formula Ca(VO)Si₄O₁₀·4(H₂O). It was named for the unusual twinning which produces an apparent five-fold symmetry. It is a dimorph of cavansite.

Pentagonite was first described in 1973 for an occurrence in Lake Owyhee State Park, Malheur County, Oregon. It has also been reported from the Pune district of India. It occurs as fracture and cavity fillings in tuff and basalt. It occurs with cavansite, heulandite, stilbite, analcime, apophyllite and calcite.

单词	Pentagonite
释义	Pentagonite 英语百科 Pentagonite Pentagonite is a rare silicate mineral with formula Ca(VO)Si₄O₁₀·4(H₂O). It was named for the unusual twinning which produces an apparent five-fold symmetry. It is a dimorph of cavansite. Pentagonite was first described in 1973 for an occurrence in Lake Owyhee State Park, Malheur County, Oregon. It has also been reported from the Pune district of India. It occurs as fracture and cavity fillings in tuff and basalt. It occurs with cavansite, heulandite, stilbite, analcime, apophyllite and calcite.
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