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Ca- and OH-dominant analogue of Humite.
OH-analogue of Unnamed (F-analogue of Chegemite).

Classification of Chegemite

Approved 2008 URL:
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Type Occurrence of Chegemite

Crystallography of Chegemite

Crystal System:
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:
a = 5.0696(1) Å, b = 11.3955(1) Å, c = 23.557(3) Å
a:b:c = 0.445 : 1 : 2.067
Unit Cell Volume:
V 1360.91 ų
space group Pbnm
X-Ray Powder Diffraction Data:
5.611 (43)
3.646 (41)
3.041 (65)
2.837 (60)
2.728 (74)
2.557 (43)
2.520 (59)
1.910 (100)

Chemical Properties of Chegemite

Essential elements:
All elements listed in formula:

Relationship of Chegemite to other Species

Forms a series with Fluorchegemite (see here)
Other Members of Group:

Other Names for Chegemite

Name in Other Languages:

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Chegemite

Reference List:
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. (2009): Chegemite Ca7(SiO4)3(OH)2 - a new humite-group calcium mineral from the Northern Caucasus, Kabardino-Balkaria, Russia. European Journal of Mineralogy 21, 1045-1059.

Internet Links for Chegemite

The following Chegemite specimens are currently listed for sale on

Localities for Chegemite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
  • Northern Caucasus Region
    • Kabardino-Balkarian Republic
      • Baksan Valley
Galuskin, E.V., Galuskina, I.O., Kusz, J., Gfeller, F., Armbruster, T., Bailau, R., Dulski, M., Gazeev, V.M., Pertsev, N.N., Zadov, A.E., Dzieržanowski, P. (2015): Mayenite supergroup, part II: Chlorkyuygenite from Upper Chegem, northern Caucasus Kabardino-Balkaria, Russia, a new microporous mayenite supergroup mineral with “zeolitic” H2O. European Journal of Mineralogy. 27, 113-122
      • Verkhnechegemskaya caldera (Verkhni Chegem caldera; Upper Chegem caldera)
European J. Min. 21,1045(2009)
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