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Chiyokoite

Year of discovery: 2019 (Japan as the first occurence in the World)

Locality list: A locality of chiyokoite

• Ca₃Si(CO₃){[B(OH)₄]_0.5(AsO₃)_0.5}(OH)₆,12H₂O
• [Ca²⁺₃][Si⁴⁺][(OH)₆|CO₃|[B(OH)₄]_0.5|(AsO₃)_0.5]^10-,12H₂O

• Class: Ettringite group
• Class: Arsenite - Nesoborate - Carbonate - Hydroxide - Hydrate

• Color: Colorless - Brown
• Luster: Vitreous
• Diaphaneity: Transparent

• System: Hexagonal
• Group: 6, P63
• Lattice: a=11.0, c=10.5

Etymology: Professor Chiyoko Henmi (1949 - 2018), mineralogist