Mendeleevite-(Ce)
A valid IMA mineral species
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Formula:
Cs6(Ce22Ca6)(Si70O175)(OH,F)14(H2O)21
Colour:
Colorless to clear tea color.
Lustre:
Vitreous
Hardness:
5 - 5½
Specific Gravity:
3.12
Crystal System:
Isometric
Name:
Named to honor of Dmitrii Ivanovich Mendeleev (Дмитрий Иванович Менделеев) (8 February 1834, Verkhnie Aremzyani, Tobolsk Governorate, Russian Empire - 2 February 1907, Saint Petersburg, Russian Empire) - the great Russian chemist, the discoverer of the periodic system. The suffix/modifier follows the IMA Levinson nomenclature for REE-bearing minerals, indicating, in this case, predominant cerium. Among many honors in his name, the element mendelevium and a large lunar crater are also named after him.
The Ce analogue of mendeleevite-(Nd).
Not to be confused with mendeleevite - a synonym for a local variety of betafite from Slyudyanka region.
Not to be confused with mendeleevite - a synonym for a local variety of betafite from Slyudyanka region.
Unique Identifiers
Mindat ID:
40154
Long-form identifier:
mindat:1:1:40154:2
GUID
(UUID V4):
(UUID V4):
1a91eb67-df2e-439b-bbad-bc75afea7c10
IMA Classification of Mendeleevite-(Ce)
Approved
IMA Formula:
Cs6(Ce,REE,Ca)30(Si70O175)(OH,F,H2O)35
Approval year:
2010
First published:
2013
Type description reference:
Classification of Mendeleevite-(Ce)
9.HG.20
9 : SILICATES (Germanates)
H : Unclassified silicates
G : With REE, Th
9 : SILICATES (Germanates)
H : Unclassified silicates
G : With REE, Th
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Mdl-Ce | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Mendeleevite-(Ce)
Vitreous
Transparency:
Transparent
Colour:
Colorless to clear tea color.
Streak:
White
Hardness:
5 - 5½ on Mohs scale
Hardness:
VHN50=613 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Conchoidal
Density:
3.12(2) g/cm3 (Measured) 3.07 g/cm3 (Calculated)
Chemistry of Mendeleevite-(Ce)
Mindat Formula:
Cs6(Ce22Ca6)(Si70O175)(OH,F)14(H2O)21
Crystallography of Mendeleevite-(Ce)
Crystal System:
Isometric
Class (H-M):
m3 (2/m 3) - Diploidal
Space Group:
Pm3
Setting:
Pm3
Cell Parameters:
a = 21.948(4) Å
Unit Cell V:
10,572.67 ų (Calculated from Unit Cell)
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0018578 | Mendeleevite-(Ce) | Sokolova E, Hawthorne F C, Pautov L A, Agakhanov A A, Karpenko V Y (2011) The crystal structure and crystal chemistry of mendeleevite-(Ce), (Cs,_)6(_,Cs)6(_,K)6(REE,Ca,_)30(Si70O175)(H2O,OH,F,_)35, a potential microporous material Tien-Shan mountains, northern Tajikistan Mineralogical Magazine 75 2583-2596 | 2011 | moraine of the Darai-Pioz glacier, Alai mountain ridge, | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
15.53 Å | (3) |
12.62 Å | (3) |
10.95 Å | (10) |
7.76 Å | (3) |
4.08 Å | (3) |
3.46 Å | (4) |
3.097 Å | (5) |
3.068 Å | (4) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 4b: Highly evolved igneous rocks | >3.0 |
35 : Ultra-alkali and agpaitic igneous rocks |
Type Occurrence of Mendeleevite-(Ce)
General Appearance of Type Material:
Well-formed cubic crystals to 30 μm.
Place of Conservation of Type Material:
Fersman Mineralogical Museum, Moscow, Russia, reg. no. 3921/1
Associated Minerals at Type Locality:
Reference:
Pautov, L.A., Agakhanov, A.A., Karpenko, V.Y., Sokolova, E.V., Hawthorne, F.C. (2013) (Cs,□)6(□,Cs)6(□,K)6(REE,Ca,□)30(Si70O175)(H2O,OH,F,□)35: a new mineral from the Darai-Pioz Massif, Tajikistan. Doklady Earth Sciences: 452: 1023-1026.
Synonyms of Mendeleevite-(Ce)
Other Language Names for Mendeleevite-(Ce)
German:Mendeleevit-(Ce)
Related Minerals - Strunz-mindat Grouping
9.HG.15 | Umbozerite | Na3Sr4Th[Si(O,OH)3-4]8 |
9.HG.20 | Rowlandite-(Y) | (Y,Ce)4Fe2+(Si2O7)2F2 (?) |
9.HG.20 | Mendeleevite-(Nd) | Cs6[(Nd,REE)23Ca7](Si70O175)(OH,F)19(H2O)16 |
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.
Internet Links for Mendeleevite-(Ce)
mindat.org URL:
https://www.mindat.org/min-40154.html
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References for Mendeleevite-(Ce)
Reference List:
Williams, P. A., Hatert, F., Pasero, M., Mills, S. (2010) New minerals and nomenclature modifications approved in 2010, CNMNC Newsletter No 2. Mineralogical Magazine, 74 (2) 375-377 doi:10.1180/s0026461x00056036
Sokolova, E., Hawthorne, F. C., Pautov, L. A., Agakhanov, A. A., Karpenko, V. YU. (2011) The crystal structure and crystal chemistry of mendeleevite-(Ce), (Cs,☐)6(☐,Cs)6(☐,K)6(REE,Ca,☐)30(Si70O175)(H2O,OH,F,☐)35, a potential microporous material. Mineralogical Magazine, 75 (5) 2583-2596 doi:10.1180/minmag.2011.075.5.2583
Localities for Mendeleevite-(Ce)
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
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