Mineralape

Roumaite

(Nb,Ti)(Ca,Na,☐)3(Ca,REE)4(Si2O7)2(OH)F3
Monoclino IMA approved

成分

Composizione (% in peso)
Ca
O
Si
Nb
F
  • CaCalcium35.8%
  • OOxygen30.6%
  • SiSilicon14.3%
  • NbNiobium11.9%
  • FFluorine7.3%
  • HHydrogen0.1%

詞源

命名來源 Rouma Island.