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Poppiite

Year of discovery: 2005 (Valgraveglia mine (Gambatesa mine), Italy), 2016 (Japan)

Locality list: A locality of poppiite

• Ca₂V₃Si₃O₁₂(OH),H₂O
• Ca₂(V,Fe,Mg)(V,Al)₂Si₃O₁₁(OH,O)₂,H₂O
• [Ca²⁺₂][V³⁺][V³⁺₂][OH|O|SiO₄|Si₂O₇]^13-,H₂O

• Class: Pumpellyite group
• Class: Sorosilicate - Nesosilicate - Oxide - Hydroxide - Hydrate

• Color: Greenish brown
• Luster: Vitrous
• Diaphaneity: Transparent-Translucent

• Density: 3.4

• System: Monoclinic
• Group: 2/m, B2/m
• Lattice: a=19.3, b=6.0, c=8.9, β=97.3