Kupletskite-(Cs)
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Kupletskite-(Cs)
Formula:
Cs2NaMn2+7Ti2[Si4O12]2O2(OH)4F
Colour:
Golden brown
Lustre:
Dull
Hardness:
4
Specific Gravity:
3.68
Crystal System:
Triclinic
Member of:
Name:
Originally named cesium kupletskite in allusion to its composition, being the caesium-dominant analogue of kupletskite. Renamed to kupletskite-(Cs).
Unique Identifiers
Mindat ID:
6853
Long-form identifier:
mindat:1:1:6853:2
Similar Names
| Kupletskite | A valid IMA mineral species - grandfathered | K2NaMn72+Ti2[Si4O12]2O2(OH)4F |
IMA Classification of Kupletskite-(Cs)
Approved
IMA status notes:
Renamed by the IMA
IMA Formula:
Cs2NaMn2+7Ti4+2(Si4O12)2O2(OH)4F
First published:
1971
Approval history:
Renamed IMA04-A: From cesium kupletskite to kupletskite-(Cs), Bayliss (2007).
Classification of Kupletskite-(Cs)
9.DC.05
9 : SILICATES (Germanates)
D : Inosilicates
C : Inosilicates with branched 2-periodic single chains; Si2O6 + 2SiO3 Si4O12
9 : SILICATES (Germanates)
D : Inosilicates
C : Inosilicates with branched 2-periodic single chains; Si2O6 + 2SiO3 Si4O12
69.1.1.3
69 : INOSILICATES Chains with Side Branches or Loops
1 : Chains with Side Branches or Loops with (P=2, and N=4, 2 branches)
69 : INOSILICATES Chains with Side Branches or Loops
1 : Chains with Side Branches or Loops with (P=2, and N=4, 2 branches)
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 for Standard |
|---|---|---|
| Kpt-Cs | 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 Kupletskite-(Cs)
Dull
Transparency:
Translucent
Colour:
Golden brown
Hardness:
4 on Mohs scale
Hardness:
VHN100=186 - Vickers
Cleavage:
Perfect
{001}
{001}
Density:
3.68 g/cm3 (Measured) 3.609 g/cm3 (Calculated)
Comment:
Dcalc from from Cámara et al. (2010).
Optical Data of Kupletskite-(Cs)
Type:
Biaxial (+)
Dispersion:
r < v
Optical Extinction:
Z = a; Y ∧ b ≃ 10°.
Pleochroism:
Visible
Comments:
X = yellow-green; Y = yellow to brown; Z = brown.
Chemistry of Kupletskite-(Cs)
Mindat Formula:
Cs2NaMn2+7Ti2[Si4O12]2O2(OH)4F
Element Weights:
Crystallography of Kupletskite-(Cs)
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 5.3850(3) Å, b = 11.9350(5) Å, c = 11.7793(6) Å
α = 113.117(1)°, β = 94.614(1)°, γ = 94.578(2)°
α = 113.117(1)°, β = 94.614(1)°, γ = 94.578(2)°
Ratio:
a:b:c = 0.451 : 1 : 0.987
Unit Cell V:
688.87 ų (Calculated from Unit Cell)
Z:
1
Comment:
Space groups and cell parameters from Cámara et al. (2010).
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
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) |
|---|---|---|---|---|---|---|---|
| 0006310 | Kupletskite-(Cs) | Camara F, Sokolova E, Abdu Y, Hawthorne F C (2010) The crystal structures of niobophyllite, kupletskite-(Cs) and Sn-rich astrophyllite: Revisions to the crystal chemistry of the astrophyllite-group minerals The Canadian Mineralogist 48 1-16 | 2010 | Dara-i-Pioz glacier, Tien-Shan mountains, northern Tajikistan | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 10.4 Å | (100) |
| 3.54 Å | (80) |
| 2.79 Å | (80) |
| 2.66 Å | (80) |
| 2.58 Å | (60) |
| 1.772 Å | (40) |
| 4.09 Å | (30) |
Comments:
Dara-i-Pioz Massif, Tajikistan. The data are from the type description.
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 Kupletskite-(Cs)
General Appearance of Type Material:
Rosettelike intergrowths of curved platy crystals, forming aggregates, to 3 cm.
Place of Conservation of Type Material:
Mineralogical Museum, St. Petersburg University, St. Petersburg, 16537; A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 74170.
Geological Setting of Type Material:
At the border of aegirine-microcline-quartz pegmatites and in polylithionite-quartz replacement complexes in pegmatites of an alkaline massif.
Associated Minerals at Type Locality:
Synonyms of Kupletskite-(Cs)
Other Language Names for Kupletskite-(Cs)
Dutch:Kupletskiet-(Cs)
German:Kupletskit-(Cs)
Russian:Куплетскит-(Cs)
Simplified Chinese:铯锰星叶石
Traditional Chinese:銫錳星葉石
Relationship of Kupletskite-(Cs) to other Species
Member of:
Other Members of Kupletskite Group:
| Heyerdahlite | Na2NaMn2+7Ti2[Si4O12]2O2(OH)4F(H2O)2 | Tric. 1 : P1 |
| Kupletskite | K2NaMn2+7Ti2[Si4O12]2O2(OH)4F | Tric. 1 : P1 |
| Laverovite | K2NaMn2+7Zr2[Si4O12]2O2(OH)4F | Tric. 1 : P1 |
| Niobokupletskite | K2NaMn2+7(NbTi)[Si4O12]2O2(OH)4O | Tric. 1 : P1 |
Forms a series with:
Common Associates
Associations Based on Photo Data:
| 3 photos of Kupletskite-(Cs) associated with Quartz | SiO2 |
| 2 photos of Kupletskite-(Cs) associated with Aegirine | NaFe3+Si2O6 |
| 2 photos of Kupletskite-(Cs) associated with Leucosphenite | BaNa4Ti2B2Si10O30 |
| 2 photos of Kupletskite-(Cs) associated with Microcline | K(AlSi3O8) |
| 1 photo of Kupletskite-(Cs) associated with 'Manganese Oxides' | |
| 1 photo of Kupletskite-(Cs) associated with Dusmatovite | K(K◻)Mn2+2Zn3[Si12O30] |
| 1 photo of Kupletskite-(Cs) associated with Maleevite | BaB2Si2O8 |
| 1 photo of Kupletskite-(Cs) associated with Aegirine-augite | (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6 |
| 1 photo of Kupletskite-(Cs) associated with Albite | Na(AlSi3O8) |
| 1 photo of Kupletskite-(Cs) associated with Polylithionite | KLi2Al(Si4O10)(F,OH)2 |
Related Minerals - Strunz-mindat Grouping
| 9.DC. | Bulgakite | Li2CaFe2+7Ti2[Si4O12]2O2(OH)4O(H2O)2 |
| 9.DC.05 | Devitoite | Ba4Ba2Fe2+7Fe3+2[Si4O12]2[PO4]2[CO3]O2(OH)4◻2 |
| 9.DC.05 | Zircophyllite | K2NaFe2+7Zr2[Si4O12]2O2(OH)4F |
| 9.DC.05 | Nalivkinite | Li2NaFe2+7Ti2[Si4O12]2O2(OH)4F(H2O)2 |
| 9.DC.05 | Sveinbergeite | (H2O)2[Ca(H2O)](Fe2+6Fe3+)Ti2[Si4O12]2O2(OH)4[(OH)(H2O)] |
| 9.DC.05 | Niobophyllite | K2NaFe2+7(NbTi)[Si4O12]2O2(OH)4O |
| 9.DC.05 | Heyerdahlite | Na2NaMn2+7Ti2[Si4O12]2O2(OH)4F(H2O)2 |
| 9.DC.05 | Tarbagataite | (K◻)CaFe2+7Ti2[Si4O12]2O2(OH)4(OH) |
| 9.DC.05 | Astrophyllite | K2NaFe2+7Ti2[Si4O12]2O2(OH)4F |
| 9.DC.05 | 'Hydroastrophyllite' | [H3O]+2CaFe2+7Ti2[Si4O12]2O2(OH)4O |
| 9.DC.05 | Lobanovite | K2Na(Fe2+4Mg2Na)Ti2[Si4O12]2O2(OH)4◻ |
| 9.DC.05 | Niobokupletskite | K2NaMn2+7(NbTi)[Si4O12]2O2(OH)4O |
| 9.DC.05 | Kupletskite | K2NaMn2+7Ti2[Si4O12]2O2(OH)4F |
| 9.DC.05 | Laverovite | K2NaMn2+7Zr2[Si4O12]2O2(OH)4F |
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 Kupletskite-(Cs)
mindat.org URL:
https://www.mindat.org/min-6853.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Kupletskite-(Cs)
Reference List:
Bayliss, P. (2007) Cesium kupletskite renamed kupletskite-(Cs) Mineralogical Magazine, 71 (3) 365-367 doi:10.1180/minmag.2007.071.3.365
Cámara, Fernando; Sokolova, Elena; Abdu, Yassir; Hawthorne, Frank C. (2010) The crystal structures of niobophyllite, kupletskite-(Cs) and Sn-rich astrophyllite: revisions to the crystal chemistry of the astrophyllite-group minerals. The Canadian Mineralogist, 48 (1). 1-16 doi:10.3749/canmin.48.1.1
Zhitova, Elena S.; Zolotarev, Andrey A.; Sheveleva, Rezeda M.; Shendrik, Roman Yu.; Hawthorne, Frank C.; Nuzhdaev, Anton A.; Vlasenko, Natalia S.; Kaneva, Ekaterina V.; Yakovenchuk, Victor N. (2025) Heat-Induced Mn2+ and Fe2+ Oxidation in Heterophyllosilicates: Kupletskite and Kupletskite-(Cs). Minerals, 15 (6). doi:10.3390/min15060587
Localities for Kupletskite-(Cs)
Showing 2 localities.
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).
All localities listed without proper references should be considered as questionable.
Russia | |
| Агаханов А.А. et al. (2015) |
Tajikistan (TL) | |
| Pekov (1998) +2 other references |
Quick NavTopAbout Kupletskite-(Cs)Unique IdentifiersSimilar NamesIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List




symbol to view information about a locality.
The
Ilmen Nature Reserve, Chelyabinsk Oblast, Russia