Svyatoslavite Mineral Data

General Svyatoslavite Information

Chemical Formula:

CaAl2Si2O8

Composition:

Molecular Weight = 278.21 gm

Calcium 14.41 % Ca 20.16 % CaO

Aluminum 19.40 % Al 36.65 % Al₂O₃

Silicon 20.19 % Si 43.19 % SiO₂

Oxygen 46.01 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaAl₂Si₂O₈

Environment:

Found as a sublimate (700-900 eg C) in a burning coal dump.

IMA Status:

Approved IMA 1989

Locality:

Kopeysk, Chelyabinsk coal basin, southern Ural mountains, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for Svyatoslav Nestorovich Ivanov (b1911), Russian geologist.

Name Pronunciation:

Svyatoslavite + Pronunciation

Svyatoslavite Crystallography

Axial Ratios:

a:b:c =0.9544:1:0.5599

Cell Dimensions:

a = 8.228, b = 8.621, c = 4.827, Z = 2; beta = 90° V = 342.40 Den(Calc)= 2.70

Crystal System:

Monoclinic - Sphenoidal H-M Symbol (2) Space Group: P 2₁

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.22(1), 2.09(0.8), 4.16(0.8),

Physical Properties of Svyatoslavite

Cleavage:

{100} Indistinct

Color:

Colorless.

Density:

2.695

Diaphaneity:

Transparent

Hardness:

6 - Orthoclase

Luminescence:

Fluorescent, Short UV=weal yellow.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Svyatoslavite

Gladstone-Dale:

CI meas= -0.017 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.015 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2112,KPDmeas= 0.2116,KC= 0.208
Ncalc = 1.56

Optical Data:

Biaxial (-), a=1.552, b=1.578, g=1.581, bire=0.0290, 2V(Calc)=36, 2V(Meas)=37.08.

Calculated Properties of Svyatoslavite

Electron Density:

Bulk Density (Electron Density)=2.68 gm/cc
note: Specific Gravity of Svyatoslavite =2.70 gm/cc.

Fermion Index:

Fermion Index = 0.0098442021
Boson Index = 0.9901557979

Photoelectric:

PE_{Svyatoslavite}= 3.12 barns/electron
U=PE_{Svyatoslavite} x rElectron Density= 8.35 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Svyatoslavite is Not Radioactive

Svyatoslavite Classification

Dana Class:

76.01.06.04 (76)Tectosilicate Al-Si Framework

(76.01)with Al-Si frameworks

(76.01.06)Banalsite group

76.01.06.01 Banalsite BaNa2Al4Si4O16 Iba2 mm2

76.01.06.02 Stronalsite SrNa2Al4Si4O16 Iba2 mm2

76.01.06.03 Lisetite Na2CaAl4Si4O16 Pbc2 mm2

76.01.06.04 Svyatoslavite CaAl2Si2O8 P 2₁ 2

Strunz Class:

09.FA.45 09 - SILICATES (Germanates)

09.F - Tektosilicates without Zeolitic H2O

09.FA -Tektosilicates without additional non-tetrahedral anions, (Al,B):Si = 1:1

09.FA.45 Svyatoslavite CaAl2Si2O8 P 2₁ 2

09.FA.45 Kumdykolite NaAlSi3O8 P 2nn or Pmnn Ortho

Other Svyatoslavite Information

References:

NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.76,p300,1996) OPTIC PROP.(Am.Min.,Vol.76,p300,1996)

See Also:

Links to other databases for Svyatoslavite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Svyatoslavite

CaAl2Si2O8
Dana No: 76.01.06.04 Strunz No: 09.FA.45
Locality:

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