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Kapitsaite-(Y) Mineral Data

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General Kapitsaite-(Y) Information

Help on Chemical  Formula: Chemical Formula: (Ba,K,Pb,Na)4(Y,Ca,REE)2[Si8B2(B,Si)2O28F]
Help on Composition: Composition: Molecular Weight = 1,419.80 gm
   Potassium         0.83 %  K     1.00 % K2O
   Barium           33.85 %  Ba   37.80 % BaO
   Sodium            0.16 %  Na    0.22 % Na2O
   Calcium           1.98 %  Ca    2.76 % CaO
   La,Ce,Pr,Nd,Sm,   2.03 %  RE    2.37 % REE2O3
   Yttrium           6.26 %  Y     7.95 % Y2O3
   Silicon          16.42 %  Si   35.12 % SiO2
   Boron             2.66 %  B     8.58 % B2O3
   Lead              2.92 %  Pb    3.14 % PbO
   Oxygen           31.55 %  O
   Fluorine          1.34 %  F     1.34 % F
                      -   %   F    -0.56 % -O=F2    
                   ______        ______ 
                   100.00 %       99.72 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ba3.5K0.3Pb0.2YCa0.7Na0.1REE0.2Si8.3B3.5O28F
Help on Environment: Environment: Found in a boulder of perialkaline pegmatite. The Y-dominant analogue of hyalotekite.
Help on IMA Status: IMA Status: Approved IMA 1998, Dana # Added
Help on Locality: Locality: Moraine of the Dara-i-Pioz glacier in the Alaiskii mountain range, Tien-Shan, northern Tajikistan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for P. L. Kapitsa (1894-1984), Russian physicist.
Help on Synonym: Synonym: IMA1998-057
 

Kapitsaite-(Y) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0305:1:0.9448
Help on Cell Dimensions: Cell Dimensions: a = 11.181, b = 10.85, c = 10.252, Z = 2; alpha = 90.64°, beta = 90.05°, gamma = 89.97° V = 1,243.63 Den(Calc)= 3.79
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: I1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.77(1)(202), 2.9(0.9)(312), 2.93(0.8)(321,231), 3.24(0.75)(013), 3.73(0.7)(300), 7.8(0.7)(110),
 

Physical Properties of Kapitsaite-(Y)

Help on Cleavage: Cleavage: None
Help on Color: Color: Light pink, White.
Help on Density: Density: 3.74
Help on Diaphaneity: Diaphaneity: Semitransparent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Wheat Sheaf - Bundle shaped aggregates resembling wheat sheafs after hand reaping wheat.
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Kapitsaite-(Y)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.02 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1661,KPDmeas= 0.1684,KC= 0.1695
Ncalc = 1.63 - 1.64
Help on Optical Data: Optical Data: Biaxial (+), a=1.624, b=1.628, g=1.637, bire=0.0130, 2V(Calc)=68, 2V(Meas)=69. Dispersion r < v moderate.
 

Calculated Properties of Kapitsaite-(Y)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.43 gm/cc
note: Specific Gravity of Kapitsaite-(Y) =3.74 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.08
Boson Index = 0.92
Help on Photoelectric: Photoelectric: PEKapitsaite-(Y) = 218.41 barns/electron
U=PEKapitsaite-(Y) x relectron= 749.19 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 2,002.54 (Gamma Ray American Petroleum Institute Units)
Concentration of Kapitsaite-(Y) per GRapi unit = 499.37 (PPM)

Estimated Radioactivity from Kapitsaite-(Y) - mild
Specimen
Size
Weight/Volume
(Sphere)
*
Calculated
Activity
Bequerols
(Bq)
Calculated
Activity
Curies (Ci)
Estimated
Activity
GR(api)
Estimated
Exposure
(mRem**)/hr
If Held in Hand
For One Hour
1000 gm / 7.99 cm 45,851 1.24E-06 2,002.54 0.66
100 gm / 3.71 cm 4,585 1.24E-07 200.25 0.07
10 gm / 1.72 cm 459 1.24E-08 20.03 0.01
1 gm / 7.99 mm 46 1.24E-09 2.00 0.00
0.1 gm / 3.71 mm 5 1.24E-10 0.20 0.00
0.01 gm / 1.72 mm 0 1.24E-11 0.02 0.00
0.001 gm / 0.80 mm 0 1.24E-12 0.00 0.00

Weight of pure Kapitsaite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.74 gm/cc.*
Goverment Estimate of Average Annual Exposure ( 360 mRem) **
Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem
Estimated Thorium Activity ( 0.10 % Th) From Sum REE Elements ( 2.03 % REE)
 

Kapitsaite-(Y) Classification

Help on  Dana Class: Dana Class: 78.06.01.02 (78)Unclassified silicates
  (78.06)possible tectosilicates
  (78.06.01)Dana Group
 
78.06.01.01 Hyalotekite (Ba,Pb,Ca,K)6(B,Si,Al)2(Si,Be)10O28(F,Cl) I1 1
 
78.06.01.02 Kapitsaite-(Y)! (Ba,K,Pb,Na)4(Y,Ca,REE)2[Si8B2(B,Si)2O28F] I1 1
Help on  Strunz Class: Strunz Class: 09.CH.05 09 - SILICATES (Germanates)
  09.C - Cyclosilicates
  09.CH -[Si4O12]8- 4-membered double rings
 
09.CH.05 Hyalotekite (Ba,Pb,Ca,K)6(B,Si,Al)2(Si,Be)10O28(F,Cl) I1 1
 
09.CH.05 Kapitsaite-(Y)! (Ba,K,Pb,Na)4(Y,Ca,REE)2[Si8B2(B,Si)2O28F] I1 1
 

Other Kapitsaite-(Y) Information

Help on References: References: NAME( AmMin, vol 86, p 768) PHYS. PROP.(AmMin, Vol 86, p 1535) OPTIC PROP.(CanMin, Vol 38)
Help on See Also: See Also: Links to other databases for Kapitsaite-(Y) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Print or Cut-and-Paste your Kapitsaite-(Y) Specimen Label here :

Kapitsaite-(Y)

(Ba,K,Pb,Na)4(Y,Ca,REE)2[Si8B2(B,Si)2O28F]
Dana No: 78.06.01.02 Strunz No: 09.CH.05
Locality:

 

Notes:

 

 
   
 


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