Chemistry:Teruggite

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

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One white crystal group of the very rare arsenate-borate mineral teruggite from the TL in Loma Blanca, Argentina and only one of three known localities worldwide.

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.

References

• Webmineral data
• Mindat.org
• Handbook of Mineralogy