AM_Chegemite Formula: Ca7 Si3 O13.76 F.24 H1.76 Name: Chegemite Unit cell: 5.0696 11.3955 23.5571 90.0 90.0 90.0 , V=1360.91 Space group: PBNM (62)

Galuskin E V , Gazeev V M , Lazic B , Armbruster T , Galuskina I O , Zadov A E , Pertsev N N , Wrzalik R , Dzierzanowski P , Gurbanov A G , Bzowska G , European Journal of Mineralogy , 21 (2009) p.1045-1059, Chegemite Ca7(SiO4)3(OH)2 - a new humite-group mineral from the Northern Caucasus,, Kabardino-Balkaria, Russia, Locality: in the high-temperature skarns in calcareous xenoliths in ignimbrites of, the Upper Chegem volcanic structure, Northern Caucasus, Kabardino-Balkaria, Russia