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Niocalite from
Mt Oldoinyo Lengai (Ol Doinyo Lengai), Arusha Region, Tanzania

Locality type:Mountain
Classification
Species:Niocalite
Formula:(Ca,Nb)4(Si2O7)(O,OH,F)2
Comments:Occurs in a solid solution with cuspidine.
Confirmation
Validity:Believed Valid
References
References:Mitchell, R.H. and Belton, F. (2004) Niocalite-cuspidine solid solution and manganoan monticellite from natrocarbonatite, Oldoinyo Lengai, Tanzania. Mineralogical Magazine: 68: 787-799.; Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.
Associated Minerals:
Associates:Cuspidine
Data
Mineral Data:Click here to view Niocalite data
Locality Data:Click here to view Mt Oldoinyo Lengai (Ol Doinyo Lengai), Arusha Region, Tanzania
Mineral and/or Locality  
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