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Fluorchegemite

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Formula:
Ca
 
7
(SiO
 
4
)
 
3
F
 
2
System:Orthorhombic


F-dominant analogue of chegemite

Classification of Fluorchegemite

IMA status:Approved 2012
mindat.org URL:http://www.mindat.org/min-42739.html
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Type Occurrence of Fluorchegemite

Type Locality:Upper Chegem volcanic caldera, Baksan Valley, Kabardino-Balkarian Republic, Northern Caucasus Region, Russia
Place of Conservation of Type Material:Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia, catalogue number 4163/1

Crystallography of Fluorchegemite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:a = 5.0620(1) Å, b = 11.3917(2) Å, c = 23.5180(3) Å
Ratio:a:b:c = 0.444 : 1 : 2.064
Unit Cell Volume:V 1,356.16 ų (Calculated from Unit Cell)
Comment:space group Pbnm
X-Ray Powder Diffraction:
d-spacingIntensity
3.636 (52)
3.013 (57)
2.991 (56)
2.832 (51)
2.718 (63)
2.699 (46)
2.531 (100)
1.905 (95)

Chemical Properties of Fluorchegemite

Formula:
Ca
 
7
(SiO
 
4
)
 
3
F
 
2
Essential elements:Ca, F, O, Si
All elements listed in formula:Ca, F, O, Si

Other Names for Fluorchegemite

Synonyms:
IMA2011-112
Other Languages:

Other Information

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

References for Fluorchegemite

Reference List:

- +
Galuskina, I.O., Lazic, B., Galuskin, E.V., Armbruster, T., Gazeev, V.M., Włodyka, R., Zadov, A.E., Dulski, M., Dzierżanowski, P. (2012) Fluorchegemite, IMA 2011-112. CNMNC Newsletter No. 13, June 2012, page 812; Mineralogical Magazine, 76, 807-817.

Internet Links for Fluorchegemite

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    • Localities for Fluorchegemite

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    (TL) indicates type locality. ? 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.
    Russia
     
    • Northern Caucasus Region
      • Kabardino-Balkarian Republic
        • Baksan Valley
    		Galuskina, I.O., Lazic, B., Galuskin, E.V., Armbruster, T., Gazeev, V.M., Włodyka, R., Zadov, A.E., Dulski, M., Dzierżanowski, P. (2012) Fluorchegemite, IMA 2011-112. CNMNC Newsletter No. 13, June 2012, page 812; Mineralogical Magazine, 76, 807-817.
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