Formula : (Ca,Fe2+,Mn,Na)2(Sb,Ti)2O6(O,OH,F)
System: cubic Hardness:5½-6 Rarity:very rare
Strunz id:IV/C.11-40 -
OXIDES and HYDROXIDES
Name origin: Named in 1841 by Augustin Alexis Damour in honor of Jean-Baptiste Louis Romé de L’Isle, French mineralogist and "father of crystallography". The name has been made into a series by IMA nomenclature revision in 2010 (Atencio et al., 2010).
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