VariousWords beta
Noun
Definition: A black, trigonal, sub-metallic mineral with the chemical formula of Mn_4²⁺Mn_9³⁺Sb⁵⁺O_16(SiO_4).
VariousWords beta
Definition: A black, trigonal, sub-metallic mineral with the chemical formula of Mn_4²⁺Mn_9³⁺Sb⁵⁺O_16(SiO_4).