Formula : (Mn2+,Ca)6[(V5+,As5+)Si5O_18_(OH)]
System: monoclinic Hardness:- Rarity:very rare
Strunz id:VIII/C.34-14 -
SILICATES
Name origin: Named in 1981 by Carlo M. Gramaccioli, William L. Giffin, and Annibale Mottana in honor of Dr. Francesco Meda (1926 - 1977), an amateur mineralogist from Turin whose enthusiastic activity as a teacher has contributed to making mineralogy popular in Italy.
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