Kupletskite
A valid IMA mineral species - grandfathered
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About Kupletskite
Formula:
(K,Na)3(Mn,Fe)7Ti2Si8O26(OH)4F
Colour:
Dark brown to black, brown, yellow
Lustre:
Adamantine, Vitreous
Hardness:
3 - 4
Specific Gravity:
3.20 - 3.36
Crystal System:
Triclinic
Member of:
Name:
Named in honor of Boris Mikhailovich Kupletski (Борис Михайлович Куплетский) (10(22) January 1894, St. Petersburg, Russian Empire - 14 January 1964, Moscow, USSR), geologist and petrographer at the Institute of Geological Sciences of the USSR Academy of Sciences, and Elsa Maximilianovna Bohnshtedt Kupletskaya (Эльза Максимилиановна Бонштедт-Куплетская) (18(30) October 1897, St. Petersburg, Russian Empire - 10 July 1974, Moscow, USSR) mineralogist and professor at the Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry (IGEM) of the Academy of Sciences of the USSR. The mineral bonshtedtite is also named after Kupletskaya.
Kupletskite-Kupletskite-(Cs) Series. The potassium analogue of Kupletskite-(Cs). Alters easily to porous black manganese oxides.
Unique Identifiers
Mindat ID:
2290
Long-form identifier:
mindat:1:1:2290:9
GUID
(UUID V4):
(UUID V4):
bf6f4bce-fb62-4b20-8117-780dd8f6a978
IMA Classification of Kupletskite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
K2NaMn2+7Ti2(Si4O12)2O2(OH)4F
First published:
1956
Classification of Kupletskite
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
69.1.1.2
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)
14.9.28
14 : Silicates not Containing Aluminum
9 : Silicates of Ti
14 : Silicates not Containing Aluminum
9 : Silicates of Ti
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Symbol | Source | Reference |
---|---|---|
Kpt | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Kpt | Warr (2020) | Warr, L.N. (2020) Recommended abbreviations for the names of clay minerals and associated phases. Clay Minerals, 55, 261–264 doi:10.1180/clm.2020.30 |
Physical Properties of Kupletskite
Adamantine, Vitreous
Transparency:
Translucent
Colour:
Dark brown to black, brown, yellow
Comment:
dark brown to black when altered to manganese oxides.
Streak:
Brown
Hardness:
3 - 4 on Mohs scale
Cleavage:
Perfect
on [100]
on [100]
Density:
3.20 - 3.36 g/cm3 (Measured) 3.05 g/cm3 (Calculated)
Optical Data of Kupletskite
Type:
Biaxial (-)
RI values:
nα = 1.656 - 1.660 nβ = 1.699 - 1.702 nγ = 1.731 - 1.734
2V:
Measured: 79° to 85°, Calculated: 78°
Max Birefringence:
δ = 0.075
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
relatively weak
Pleochroism:
Visible
Comments:
Pleochroic with Z brown to X orange-yellow.
Chemistry of Kupletskite
Mindat Formula:
(K,Na)3(Mn,Fe)7Ti2Si8O26(OH)4F
Common Impurities:
Zr,Al,Mg,Ca,Ba,H2O
Crystallography of Kupletskite
Crystal System:
Triclinic
Cell Parameters:
a = 13.14 Å, b = 12.82 Å, c = 5.42 Å
α = 93.94°, β = 101.4°, γ = 113.38°
α = 93.94°, β = 101.4°, γ = 113.38°
Ratio:
a:b:c = 1.025 : 1 : 0.423
Unit Cell V:
810.47 ų (Calculated from Unit Cell)
Z:
1
Morphology:
Lamellar masses; fine plates; lamellar and acicular crystals
Comment:
Monoclinic, or triclinic, pseudomonoclinic. Point Group: n.d.; Space Group: n.d.
Crystal Structure
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2x2x2 | 3x3x3 | 4x4x4
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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) |
---|---|---|---|---|---|---|---|
0005804 | Kupletskite | Piilonen P C, McDonald A M, Lalonde A E (2003) Insights into astrophyllite-group minerals II: Crystal chemistry The Canadian Mineralogist 41 27-54 | 2003 | Gjerdingen intrusion, Norway | 0 | 293 | |
0005807 | Kupletskite | Piilonen P C, McDonald A M, Lalonde A E (2003) Insights into astrophyllite-group minerals II: Crystal chemistry The Canadian Mineralogist 41 27-54 | 2003 | Lovozero massif, Kola Peninsula, Russia | 0 | 293 | |
0005808 | Kupletskite | Piilonen P C, McDonald A M, Lalonde A E (2003) Insights into astrophyllite-group minerals II: Crystal chemistry The Canadian Mineralogist 41 27-54 | 2003 | Lovozero massif, Kola Peninsula, Russia | 0 | 293 | |
0005810 | Kupletskite | Piilonen P C, McDonald A M, Lalonde A E (2003) Insights into astrophyllite-group minerals II: Crystal chemistry The Canadian Mineralogist 41 27-54 | 2003 | nepheline syenite pegmatite at Mont Saint-Hilaire, Quebec, Canada | 0 | 293 | |
0005811 | Kupletskite | Piilonen P C, McDonald A M, Lalonde A E (2003) Insights into astrophyllite-group minerals II: Crystal chemistry The Canadian Mineralogist 41 27-54 | 2003 | nepheline syenite pegmatite at Mont Saint-Hilaire, Quebec, Canada | 0 | 293 | |
0005812 | Kupletskite | Piilonen P C, McDonald A M, Lalonde A E (2003) Insights into astrophyllite-group minerals II: Crystal chemistry The Canadian Mineralogist 41 27-54 | 2003 | nepheline syenite pegmatite at Mont Saint-Hilaire, Quebec, Canada | 0 | 293 | |
0005813 | Kupletskite | Piilonen P C, McDonald A M, Lalonde A E (2003) Insights into astrophyllite-group minerals II: Crystal chemistry The Canadian Mineralogist 41 27-54 | 2003 | nepheline syenite pegmatite at Mont Saint-Hilaire, Quebec, Canada | 0 | 293 | |
0005814 | Kupletskite | Piilonen P C, McDonald A M, Lalonde A E (2003) Insights into astrophyllite-group minerals II: Crystal chemistry The Canadian Mineralogist 41 27-54 | 2003 | nepheline syenite pegmatite at Mont Saint-Hilaire, Quebec, Canada | 0 | 293 | |
0005815 | Kupletskite | Piilonen P C, McDonald A M, Lalonde A E (2003) Insights into astrophyllite-group minerals II: Crystal chemistry The Canadian Mineralogist 41 27-54 | 2003 | nepheline syenite pegmatite at Mont Saint-Hilaire, Quebec, Canada | 0 | 293 | |
0005816 | Kupletskite | Piilonen P C, McDonald A M, Lalonde A E (2003) Insights into astrophyllite-group minerals II: Crystal chemistry The Canadian Mineralogist 41 27-54 | 2003 | nepheline syenite pegmatite at Mont Saint-Hilaire, Quebec, Canada | 0 | 293 | |
0005817 | Kupletskite | Piilonen P C, McDonald A M, Lalonde A E (2003) Insights into astrophyllite-group minerals II: Crystal chemistry The Canadian Mineralogist 41 27-54 | 2003 | nepheline syenite pegmatite at Mont Saint-Hilaire, Quebec, Canada | 0 | 293 | |
0005820 | Kupletskite | Piilonen P C, McDonald A M, Lalonde A E (2003) Insights into astrophyllite-group minerals II: Crystal chemistry The Canadian Mineralogist 41 27-54 | 2003 | altered nepheline syenite pegmatite at Mont Saint-Hilaire, Quebec, Canada | 0 | 293 | |
0006907 | Kupletskite | Piilonen P C, McDonald A M, LaLonde A E (2001) Kupletskite polytypes from the Lovozero massif, Kola Peninsula, Russia: Kupletskite-1A and kupletskite-Ma2b2c European Journal of Mineralogy 13 973-984 | 2001 | Lovozero massif, Kola Peninsula, Russia | 0 | 293 | |
0006908 | Kupletskite | Piilonen P C, McDonald A M, LaLonde A E (2001) Kupletskite polytypes from the Lovozero massif, Kola Peninsula, Russia: Kupletskite-1A and kupletskite-Ma2b2c European Journal of Mineralogy 13 973-984 | 2001 | Lovozero massif, Kola Peninsula, Russia | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.505 Å | (8) |
2.642 Å | (8) |
2.573 Å | (4) |
2.099 Å | (3) |
1.732 Å | (3) |
3.249 Å | (1) |
2.998 Å | (1) |
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
Co-Type Localities:
General Appearance of Type Material:
In lamellar masses up to 5 X 3 X 1 cm, consisting of individual plates with perfect cleavage
Geological Setting of Type Material:
In natrolite central part of nepheline syenite pegmatites
Associated Minerals at Type Locality:
Reference:
Semenov, E.I. (1956) Kupletskite - a new mineral of the astrophyllite group. Doklady Akademii Nauk SSSR: 108: 933-936.
Other Language Names for Kupletskite
German:Kupletskit
Russian:Куплетскит
Simplified Chinese:锰星叶石
Spanish:Kupletskita
Traditional Chinese:錳星葉石
Varieties of Kupletskite
Relationship of Kupletskite to other Species
Member of:
Other Members of this group:
Kupletskite-(Cs) | Cs2NaMn2+7Ti2(Si4O12)2O2(OH)4F | Tric. 1 : P1 |
Laverovite | K2NaMn7Zr2(Si4O12)2O2(OH)4F | Tric. 1 : P1 |
Niobokupletskite | K2NaMn2+7(Nb,Ti)(Si4O12)2O2(OH)4(O,F) | Tric. 1 : P1 |
Forms a series with:
Common Associates
Associated Minerals Based on Photo Data:
54 photos of Kupletskite associated with Aegirine | NaFe3+Si2O6 |
26 photos of Kupletskite associated with Analcime | Na(AlSi2O6) · H2O |
15 photos of Kupletskite associated with Natrolite | Na2Al2Si3O10 · 2H2O |
14 photos of Kupletskite associated with Catapleiite | Na2Zr(Si3O9) · 2H2O |
14 photos of Kupletskite associated with Microcline | K(AlSi3O8) |
10 photos of Kupletskite associated with Genthelvite | Be3Zn4(SiO4)3S |
9 photos of Kupletskite associated with Serandite | NaMn2+2Si3O8(OH) |
9 photos of Kupletskite associated with Monazite-(Ce) | Ce(PO4) |
9 photos of Kupletskite associated with Albite | Na(AlSi3O8) |
8 photos of Kupletskite associated with Pectolite | NaCa2Si3O8(OH) |
Related Minerals - Strunz-mindat Grouping
9.DC. | Bulgakite | Li2(Ca,Na)Fe2+7Ti2(Si4O12)2O2(OH)4(F,O)(H2O)2 |
9.DC.05 | Astrophyllite | K2NaFe2+7Ti2Si8O26(OH)4F |
9.DC.05 | Hydroastrophyllite | (H3O,K,Ca)3(Fe,Mn)5-65Ti2Si8(O,OH)31 |
9.DC.05 | Lobanovite | K2Na(Fe2+4Mg2Na)Ti2(Si4O12)2O2(OH)4 |
9.DC.05 | Niobophyllite | (K,Na)3(Fe,Mn)6(Nb,Ti)2Si8(O,OH,F)31 |
9.DC.05 | Zircophyllite | K2NaFe2+7Zr2(Si4O12)2O2(OH)4F |
9.DC.05 | Kupletskite-(Cs) | Cs2NaMn2+7Ti2(Si4O12)2O2(OH)4F |
9.DC.05 | Niobokupletskite | K2NaMn2+7(Nb,Ti)(Si4O12)2O2(OH)4(O,F) |
9.DC.05 | Nalivkinite | Li2Na(Fe2+,Mn2+)7Ti2Si8O26(OH)4F |
9.DC.05 | Devitoite | [Ba6(PO4)2(CO3)][Fe2+7(OH)4Fe3+2O2(Si4O12)2] |
9.DC.05 | Sveinbergeite | Ca(Fe2+6Fe3+)Ti2(Si4O12)2O2(OH)5(H2O)4 |
9.DC.05 | Tarbagataite | (K◻)Ca(Fe2+,Mn)7Ti2(Si4O12)2O2(OH)5 |
9.DC.05 | Heyerdahlite | Na3Mn7Ti2(Si4O12)2O2(OH)4F(H2O)2 |
9.DC.05 | Laverovite | K2NaMn7Zr2(Si4O12)2O2(OH)4F |
Other Information
Notes:
Melts easily before the blowpipe to a weakly magnetic dark
globule.
globule.
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
mindat.org URL:
https://www.mindat.org/min-2290.html
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References for Kupletskite
Reference List:
Piilonen, P. C., Lalonde, A. E., McDonald, A. M., Gault, R. A., Larsen, A. O. (2003) Insights into Astrophyllite-group minerals. I. Nomenclature, composition and development of standardized general formula. The Canadian Mineralogist, 41 (1) 1-26 doi:10.2113/gscanmin.41.1.1
Localities for Kupletskite
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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Pegmatite No. 47, Lepkhe-Nel'm Mt, Seidozero Lake, Lovozersky District, Murmansk Oblast, Russia