Teruggite

Teruggite is a mineral with the chemical formula Ca₄MgAs₂B₁₂O₂₂(OH)₁₂·12H₂O. It is colorless. Its crystals are monoclinic prismatic. It is transparent. It is not radioactive. It has vitreous luster. Teruggite is rated 2.5 on the Mohs Scale of hardness.

Teruggite
General
Category	Nesoborates
Formula (repeating unit)	Ca4MgAs2B12O22(OH)12·12H2O
Strunz classification	6.FA.25
Crystal system	Monoclinic
Crystal class	Prismatic (2/m) (same H-M symbol)
Space group	P21/a

This article uses material from the Wikipedia article  Metasyntactic variable, which is released under the  Creative Commons Attribution-ShareAlike 3.0 Unported License.