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Kapitsaite-(Y)

Formula:
(Ba,K,Pb)
 
4
(Y,Ca)
 
2
Si
 
8
(B,Si)
 
4
O
 
28
F
System:TriclinicColour:Pale pink
Lustre:VitreousHardness:5½
Name:For P.L.Kaptsa (1894-1984)
This page provides mineralogical data about Kapitsaite-(Y).

Classification of Kapitsaite-(Y)

IMA status:Approved
Nickel-Strunz 10th (pending) edition ID:9.CH.05

9 : SILICATES (Germanates)
C : Cyclosilicates
H : [Si4O12]8- 4-membered double rings
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Type Occurrence of Kapitsaite-(Y)

Type Locality:Dara-i-Pioz Glacier, Alayskiy (Alai) Range, Tien Shan Mts, Region of Republican Subordination, Tajikistan

Physical Properties of Kapitsaite-(Y)

Lustre:Vitreous
Colour:Pale pink
Streak:white
Hardness (Mohs):5½

Crystallography of Kapitsaite-(Y)

Crystal System:Triclinic

Optical Data of Kapitsaite-(Y)

Type:Biaxial (+)
RI values: nα = 1.624 nβ = 1.628 nγ = 1.637
2V:Measured: 69° , Calculated: 68°
Maximum Birefringence:δ = 0.013

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:r < v moderate

Chemical Properties of Kapitsaite-(Y)

Formula:
(Ba,K,Pb)
 
4
(Y,Ca)
 
2
Si
 
8
(B,Si)
 
4
O
 
28
F
Essential elements:B, Ba, F, O, Si, Y
All elements listed in formula:B, Ba, Ca, F, K, O, Pb, Si, Y

Relationship of Kapitsaite-(Y) to other Species

Related Minerals - Nickel-Strunz Grouping):
9.CH.05Hyalotekite
(Ba,Pb,Ca,K)
 
6
(B,Si,Al)
 
2
(Si,Be)
 
10
O
 
28
(F,Cl)
9.CH.10Iraqite-(La)
K(Ca,Na)
 
2
(La,Ce,Th)[(Si,Al)
 
8
O
 
20
]
9.CH.10Steacyite
([ ],K)(Na,Ca)
 
2
(Th,U)[Si
 
8
O
 
20
]
9.CH.10Turkestanite
(K,[ ])(Ca,Na)
 
2
(Th,U)[Si
 
8
O
 
20
] · nH
 
2
O
9.CH.10Arapovite
(K,[ ])(Ca,Na)
 
2
(U,Th)[Si
 
8
O
 
20
] · H
 
2
O

Other Names for Kapitsaite-(Y)

Synonyms:
IMA1998-057

Other Information

Health Warning: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)

Reference List:Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva (2000): 129(6): 42-49.

Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for Kapitsaite-(Y)

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    Localities for Kapitsaite-(Y)

    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Tajikistan
     
    • Region of Republican Subordination
      • Tien Shan Mts
        • Alayskiy (Alai) Range
    		CanMin 42:107-119 (2004)
    Mineral and/or Locality
    Google
     
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