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Hydroxycalciomicrolite

Year of discovery: 2013 (Volta Grande mine, Brazil), 2014 (Japan)

Locality list: A locality of hydroxycalciomicrolite

• CaNaTa₂O₆(OH)
• (Ca,Na)₂(Ta,Nb)₂O₆(OH)
• [Ca²⁺][Na⁺][OH|(TaO₃)₂]^3-

• Class: Microlite group < Pyrochlore supergroup
• Class: Tantalate - Hydroxide

• OH => F: Fluorcalciomicrolite

• Color: Brown
• Luster: Resinous
• Diaphaneity: Translucent

• Cleavage: No
• Hardness: 5

• System: Cubic
• Group: 432, P4₂32
• Lattice: a=10.4