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About Kapitsaite-(Y)Hide

Pyotr Kapitsa
Pale pink
Specific Gravity:
Crystal System:
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 crystal structure is very closely related to that of itsiite.

Classification of Kapitsaite-(Y)Hide

First Published:

9 : SILICATES (Germanates)
C : Cyclosilicates
H : [Si4O12]8- 4-membered double rings

Physical Properties of Kapitsaite-(Y)Hide

Pale pink
5½ on Mohs scale
None Observed
3.74(3) g/cm3 (Measured)    3.79 g/cm3 (Calculated)

Optical Data of Kapitsaite-(Y)Hide

Biaxial (+)
RI values:
nα = 1.624(3) nβ = 1.628(2) nγ = 1.637(2)
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.
Surface Relief:
r < v moderate

Chemical Properties of Kapitsaite-(Y)Hide

IMA Formula:

Crystallography of Kapitsaite-(Y)Hide

Crystal System:
Class (H-M):
1 - Pinacoidal
Space Group:
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)°
a:b:c = 1.031 : 1 : 0.945
Unit Cell V:
1,243.63 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
7.80 (70)
3.77 (100)
3.73 (70)
3.71 (50)
3.49 (60)
3.41 (50)
3.24 (75)
3.09 (60)
2.96 (60)
2.93 (80)
2.90 (90)
2.74 (65)
2.59 (50)
2.122 (60)

Type Occurrence of Kapitsaite-(Y)Hide

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:
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)Hide

Other Language Names for Kapitsaite-(Y)Hide

Simplified Chinese:卡硼硅钡钇石
Traditional Chinese:卡硼矽鋇釔石

Relationship of Kapitsaite-(Y) to other SpeciesHide

Other Members of this group:
Hyalotekite(Pb,Ba,K)4(Ca,Y)2(B,Be)2(Si,B)2Si8O28(F,Cl)Tric. 1 : P1
ItsiiteBa2Ca(BSi2O7)2Tet. 4 2m : I4 2m

Related Minerals - Nickel-Strunz GroupingHide

9.CH.05Hyalotekite(Pb,Ba,K)4(Ca,Y)2(B,Be)2(Si,B)2Si8O28(F,Cl)Tric. 1 : P1
9.CH.10SteacyiteK0.3(Na,Ca)2ThSi8O20Tet. 4/mmm (4/m 2/m 2/m) : P4/mcc
9.CH.10Turkestanite(K,◻)(Ca,Na)2ThSi8O20 · nH2OTet. 4/mmm (4/m 2/m 2/m) : P4/mcc
9.CH.10Arapovite(K1-xx)(Ca,Na)2U4+Si8O20 (x ~ 0.5)Tet. 4/mmm (4/m 2/m 2/m) : P4/mcc

Fluorescence of Kapitsaite-(Y)Hide

Pale-pink luminescence in shortwave-UV-Light.

Other InformationHide

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

References for Kapitsaite-(Y)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Grew, E.S., Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).
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.
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. Neues Jahrbuch für Mineralogie, Monatshefte: 2000: 74-84.
Jambor, J.L., Roberts, A.C. (2001) New mineral names. American Mineralogist: 86: 767-770.
Jambor, J.L., Roberts, A.C. (2001) New mineral names. American Mineralogist: 86: 1534-1537.
Mandarino, J.A. (2001) New minerals. The Canadian Mineralogist: 39: 1473-1502.
Jambor, J.L., Roberts, A.C. (2002) New mineral names. American Mineralogist: 87: 765-768.
Pekov, I.V. (2007) New minerals from former Soviet Union countries, 1998-2006: new minerals approved by the IMA commission on new minerals and mineral names. Mineralogical Almanac: 11: 9-51.

Internet Links for Kapitsaite-(Y)Hide

Localities for Kapitsaite-(Y)Hide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Tajikistan (TL)
  • Districts of Republican Subordination
    • Tien Shan Mtn
      • Alai Range (Alayskiy)
Canadian Mineralogist 42:107-119 (2004); Agakhanov A.A., Pautov L.A., Karpenko V.Yu., Bekenova G.K., Uvarova Y.A. (2011) Orlovite, KLi2 TiSi4 O11F, a new mineral of the mica group New Mineral Data 46:13-19
Mineral and/or Locality  
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