Burovaite-Ca Mineral Data

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General Burovaite-Ca Information

Chemical Formula:

(K,Na)4Ca2(Ti,Nb)8[Si4O12]4(OH,O)8•12H2O

Composition:

Molecular Weight = 2,235.05 gm

Potassium 1.87 % K 2.25 % K₂O

Barium 0.25 % Ba 0.27 % BaO

Sodium 3.19 % Na 4.30 % Na₂O

Strontium 0.16 % Sr 0.19 % SrO

Calcium 2.96 % Ca 4.14 % CaO

Tantalum 0.16 % Ta 0.20 % Ta₂O₅

Titanium 10.65 % Ti 17.76 % TiO₂

Niobium 10.64 % Nb 15.22 % Nb₂O₅

Aluminum 0.08 % Al 0.16 % Al₂O₃

Zinc 0.03 % Zn 0.04 % ZnO

Iron 0.20 % Fe 0.26 % FeO

Silicon 20.02 % Si 42.82 % SiO₂

Hydrogen 1.38 % H 12.37 % H₂O

Oxygen 48.41 % O

______ ______

100.00 % 99.99 % = TOTAL OXIDE

Empirical Formula:

Na_3.1K_1.07Ca_0.37Sr_0.04Ba_0.04Ca_1.28Zn_0.01Ti_4.97Nb_2.56Fe²⁺_0.08Ta_0.02Si_15.93Al_0.07O₄₈ (OH)_6.7O_0.93·12(H₂O)

Environment:

Labuntsovite group

IMA Status:

Approved IMA 2008 (Dana # Added)

Locality:

Khibinpakhchorr Mt., Khibiny massif, Kola Peninsula, Russia Link to MinDat.org Location Data.

Name Origin:

Commission on New Minerals, Nomenclature and Classification (CNMNC)

Synonym:

IMA2008-001

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Burovaite-Ca Crystallography

Axial Ratios:

a:b:c =1.0229:1:0.5561

Cell Dimensions:

a = 14.529, b = 14.203, c = 7.899, Z = 2; beta = 117.37° V = 1,447.53 Den(Calc)= 5.13

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

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

By Intensity(I/I_o): 3.25(1), 1.444(0.7), 1.577(0.7),1.712(0.7), 2.49(0.7), 3.11(0.7), 7.08(0.7), 2.61(0.5),

Optical Properties of Burovaite-Ca

Optical Data:

NCalc= 2.36 - from Gladstone-Dale relationship (KC = 0.2648) where Ncalc=Dcalc*KC+1

Calculated Properties of Burovaite-Ca

Electron Density:

Bulk Density (Electron Density)=5.07 gm/cc
note: Specific Gravity of Burovaite-Ca =5.13 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Burovaite-Ca= 21.28 barns/electron
U=PE_Burovaite-Ca x r_electron= 107.95 barns/cc.

Radioactivity:

GRapi = 26.70 (Gamma Ray American Petroleum Institute Units)
Concentration of Burovaite-Ca per GRapi unit = 3.75 (%)

Estimated Radioactivity from Burovaite-Ca - barely detectable

Burovaite-Ca Classification

Dana Class:

59.00.00.00 (59)Cyclosilicate Minerals

(59.00)Without Dana Classification Numbers

(59.00.00)Silicate, Unclassified

59.00.00.00 Burovaite-Ca! (K,Na)4Ca2(Ti,Nb)8[Si4O12]4(OH,O)8•12H2O C 2/m 2/m

Strunz Class:

09.CE.30c 09 - SILICATES (Germanates)

09.C - Cyclosilicates

09.CE -[Si4O12]8- 4-membered single rings (vierer-Einfachringe),

09.CE.30c Gjerdingenite-Mn! (K,Na)2(Mn,Fe)(Nb,Ti)4(Si4O12)2(O,OH)4•6(H2O) C 2/m 2/m

09.CE.30c Karupmollerite-Ca! (Na,Ca,K)2Ca(Nb,Ti)4(Si4O12)2(O,OH)4•7(H2O) C 2/m 2/m

09.CE.30c Kuzmenkoite-Zn! K2Zn(Ti,Nb)4(Si4O12)2(OH,O)4•6-8(H2O) Cm m

09.CE.30c Kuzmenkoite-Mn! (K,Na)2(Mn,Fe)(Ti,Nb)4[Si4O12]2(OH)4•5(H2O) C 2/m 2/m

09.CE.30c Gjerdingenite-Fe! K2[(H2O)2(Fe,Mn)][(Nb,Ti)4(Si4O12)2(O,OH)4]•4(H2O) C 2/m 2/m

09.CE.30c Lepkhenelmite-Zn! Ba2Zn(Ti,Nb)4(Si4O12)2(O,OH)4•7(H2O) Cm m

09.CE.30c Gjerdingenite-Ca! K2Ca(Nb,Ti)4(Si4O12)2(O,OH)4•6H2O C 2/m 2/m

09.CE.30c Gjerdingenite-Na! (K,Na)2Na(Nb,Ti)4(Si4O12)2(OH,O)4•5H2O C 2/m 2/m

09.CE.30c Burovaite-Ca! (K,Na)4Ca2(Ti,Nb)8[Si4O12]4(OH,O)8•12H2O C 2/m 2/m

Other Burovaite-Ca Information

References:

PHYS. PROP.(Proceedings of the Russian Min Soc, 2009:40)

See Also:

Links to other databases for Burovaite-Ca :
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 Burovaite-Ca Specimen Label here :

Burovaite-Ca

(K,Na)4Ca2(Ti,Nb)8[Si4O12]4(OH,O)8•12H2O
Dana No: 59.00.00.00 Strunz No: 09.CE.30c
Locality:

Notes: