Teruggite

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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.

CategoryNesoborates
FormulaCa4MgAs2B12O22(OH)12·12H2O
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Teruggite
General
CategoryNesoborates
FormulaCa4MgAs2B12O22(OH)12·12H2O
IMA symbolTgg[1]
Strunz classification6.FA.25
Crystal systemMonoclinic
Crystal classPrismatic (2/m)
(same H-M symbol)
Space groupP21/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.

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