Kapitsaite-(Y)
A valid IMA mineral species
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About Kapitsaite-(Y)
Pyotr Kapitsa
Formula:
(Ba,K,Pb)4(Y,Ca)2Si8(B,Si)4O28F
more correctly given as Ba4(YCa)[Si8B2B2O28]F (Hawthorne et al, 2018)
Colour:
Pale pink
Lustre:
Vitreous
Hardness:
5½
Specific Gravity:
3.74
Crystal System:
Triclinic
Member of:
Name:
Named in honor of Pyotr Leonidovich Kapitsa (Пётр Леони́дович Капи́ца) (8 July [O.S. 26 June] 1894[2], Kronstadt, Russian Empire – 8 April 1984, Moscow, Soviet Union), physicist. He was given many awards including the 1978 Nobel Prize in Physics for his work on low temperature physics.
Isostructural with:
The YCaB2 analogue of hyalotekite. The crystal structure is very closely related to that of itsiite.
Unique Identifiers
Mindat ID:
7064
Long-form identifier:
mindat:1:1:7064:1
GUID
(UUID V4):
(UUID V4):
9a2ece67-a187-478a-9eba-3179d506dc3f
IMA Classification of Kapitsaite-(Y)
Approved
IMA Formula:
Ba4Y2Si8B4O28F
First published:
2000
Classification of Kapitsaite-(Y)
9.CH.05
9 : SILICATES (Germanates)
C : Cyclosilicates
H : [Si4O12]8- 4-membered double rings
9 : SILICATES (Germanates)
C : Cyclosilicates
H : [Si4O12]8- 4-membered double rings
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 |
|---|---|---|
| Ksa-Y | 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 Kapitsaite-(Y)
Vitreous
Transparency:
Transparent
Colour:
Pale pink
Streak:
white
Hardness:
5½ on Mohs scale
Cleavage:
None Observed
Fracture:
Conchoidal
Density:
3.74(3) g/cm3 (Measured) 3.79 g/cm3 (Calculated)
Optical Data of Kapitsaite-(Y)
Type:
Biaxial (+)
RI values:
nα = 1.624(3) nβ = 1.628(2) nγ = 1.637(2)
2V:
Measured: 69° (4), Calculated: 67.7°
Max Birefringence:
δ = 0.013
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:
Moderate
Dispersion:
r < v moderate
Chemistry of Kapitsaite-(Y)
Mindat Formula:
(Ba,K,Pb)4(Y,Ca)2Si8(B,Si)4O28F
more correctly given as Ba4(YCa)[Si8B2B2O28]F (Hawthorne et al, 2018)
more correctly given as Ba4(YCa)[Si8B2B2O28]F (Hawthorne et al, 2018)
Crystallography of Kapitsaite-(Y)
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 11.181(4) Å, b = 10.850(4) Å, c = 10.252(4) Å
α = 90.64(6)°, β = 90.05(4)°, γ = 89.97(7)°
α = 90.64(6)°, β = 90.05(4)°, γ = 89.97(7)°
Ratio:
a:b:c = 1.031 : 1 : 0.945
Unit Cell V:
1,243.63 ų (Calculated from Unit Cell)
Z:
2
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) |
|---|---|---|---|---|---|---|---|
| 0014904 | Kapitsaite-(Y) | Sokolova E V, Ferraris G, Ivaldi G, Pautov L A, Khvorov P V (2000) Crystal structure of kapitsaite-(Y), a new borosilicate isotypic with hyalotekite - Crystal chemistry of the related isomorphous series Garmskii district, Northern Tajikistan Neues Jahrbuch fur Mineralogie, Monatshefte 2000 74-84 | 2000 | Dara-i-Pioz glacier, Alaiskii mountain range, Tien-Shan, | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.80 Å | (70) |
| 3.77 Å | (100) |
| 3.73 Å | (70) |
| 3.71 Å | (50) |
| 3.49 Å | (60) |
| 3.41 Å | (50) |
| 3.24 Å | (75) |
| 3.09 Å | (60) |
| 2.96 Å | (60) |
| 2.93 Å | (80) |
| 2.90 Å | (90) |
| 2.74 Å | (65) |
| 2.59 Å | (50) |
| 2.122 Å | (60) |
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 Kapitsaite-(Y)
General Appearance of Type Material:
sheaf-like agregate (1 х 3 сm) of pale-pink grains
Place of Conservation of Type Material:
Fersman Mineralogical Museum, Moscow, Russia
Associated Minerals at Type Locality:
Reference:
Pautov L.A., Khvorov, P.V., Sokolova, E.V., Ferraris, G., Ivaldi, G., Bazhenova, L.F. (2000) Kapitsaite-(Y) (Ba,K)4(Y,Ca)2Si8(B,Si)4O28F — a new mineral. Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 129(6): 42-49.
Synonyms of Kapitsaite-(Y)
Other Language Names for Kapitsaite-(Y)
Relationship of Kapitsaite-(Y) to other Species
Member of:
Other Members of this group:
| Hyalotekite | (Ba,Pb,K)4(Ca,Y)2(B,Be)2(Si,B)2Si8O28(F,Cl) | Tric. 1 : P1 |
| Itsiite | Ba4Ca2[Si8B4O28]◻ | Tet. 4 2m : I4 2m |
| Khvorovite | (Pb,Ba,K)4Ca2[Si8B2(Si,B)2O28]F | Tric. |
Related Minerals - Strunz-mindat Grouping
| 9.CH.05 | Hyalotekite | (Ba,Pb,K)4(Ca,Y)2(B,Be)2(Si,B)2Si8O28(F,Cl) |
| 9.CH.05 | Itsiite | Ba4Ca2[Si8B4O28]◻ |
| 9.CH.05 | Khvorovite | (Pb,Ba,K)4Ca2[Si8B2(Si,B)2O28]F |
| 9.CH.10 | Iraqite-(La) | KCa2(La,Ce,Th)Si8O20 |
| 9.CH.10 | Steacyite | K0.3(Na,Ca)2ThSi8O20 |
| 9.CH.10 | Turkestanite | (K,◻)(Ca,Na)2ThSi8O20 · nH2O |
| 9.CH.10 | Arapovite | (K1-x◻x)(Ca,Na)2U4+Si8O20 (x ~ 0.5) |
Fluorescence of Kapitsaite-(Y)
Pale-pink luminescence in shortwave-UV-Light.
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 Kapitsaite-(Y)
mindat.org URL:
https://www.mindat.org/min-7064.html
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References for Kapitsaite-(Y)
Reference List:
Pautov, L. A., Khvorov, P. V., Sokolova, E. V., Ferraris, G., Ivaldi, G., Bazhenova, L. F. (2000) Kapitsaite-(Y) (Ba,K)4(Y,Ca)2Si8(B,Si)4O28F — a new mineral. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva, 129 (6) 42-49
Mandarino, Joseph A. (2001) New minerals. The Canadian Mineralogist, 39 (5) 1473-1502 doi:10.2113/gscanmin.39.5.1473
Localities for Kapitsaite-(Y)
symbol to view information about a locality.
The 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.
Tajikistan (TL) | |
| Canadian Mineralogist 42:107-119 (2004) +1 other reference |
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Dara-i-Pioz Massif, Districts of Republican Subordination, Tajikistan