Formula : Mn42+[As5+Si3O12(OH)]
System: monoclinic Hardness:n.d. Rarity:very rare
Strunz id:VIII/C.34-12 -
SILICATES
Name origin: Named after Paolo Onofrio Tiragallo (1905, Carro, La Spezia, Liguria, Italy - 1987), distinguished amateur mineralogist. Conservator and curator of the mineralogical collection of the University of Genoa.
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