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Burovaite-Ca Mineral Data
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General Burovaite-Ca Information
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 Chemical Formula: |
(K,Na)4Ca2(Ti,Nb)8[Si4O12]4(OH,O)8•12H2O |
| Composition: |
Molecular Weight = 2,235.05 gm |
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Potassium 1.87 % K 2.25 % K2O |
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Barium 0.25 % Ba 0.27 % BaO |
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Sodium 3.19 % Na 4.30 % Na2O |
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Strontium 0.16 % Sr 0.19 % SrO |
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Calcium 2.96 % Ca 4.14 % CaO |
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Tantalum 0.16 % Ta 0.20 % Ta2O5 |
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Titanium 10.65 % Ti 17.76 % TiO2 |
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Niobium 10.64 % Nb 15.22 % Nb2O5 |
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Aluminum 0.08 % Al 0.16 % Al2O3 |
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Zinc 0.03 % Zn 0.04 % ZnO |
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Iron 0.20 % Fe 0.26 % FeO |
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Silicon 20.02 % Si 42.82 % SiO2 |
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Hydrogen 1.38 % H 12.37 % H2O |
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Oxygen 48.41 % O |
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______ ______ |
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100.00 % 99.99 % = TOTAL OXIDE |
| Empirical Formula: |
Na3.1K1.07Ca0.37Sr0.04Ba0.04Ca1.28Zn0.01Ti4.97Nb2.56Fe2+0.08Ta0.02Si15.93Al0.07O48
(OH)6.7O0.93�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
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| 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 - Prismatic H-M Symbol (2/m) Space Group: C 2/m |
| X Ray Diffraction: |
By Intensity(I/Io): 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), |
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Optical Properties of Burovaite-Ca
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| Optical Data: |
NCalc= 2.36 - from Gladstone-Dale relationship (KC = 0.2648) where Ncalc=Dcalc*KC+1
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Calculated Properties of Burovaite-Ca
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| Electron Density: |
Bulk Density (Electron Density)=5.07 gm/cc
note: Specific Gravity of Burovaite-Ca =5.13 gm/cc.
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| Fermion Index: |
Fermion Index = 0.02
Boson Index = 0.98 |
| Photoelectric: |
PEBurovaite-Ca = 21.28 barns/electron
U=PEBurovaite-Ca x relectron= 107.95 barns/cc.
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| 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
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Burovaite-Ca Classification
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| Dana Class: |
59.00.00.00 (59)Cyclosilicate Minerals |
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(59.00)Without Dana Classification Numbers |
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(59.00.00)Silicate, Unclassified |
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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) |
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09.C - Cyclosilicates |
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09.CE -[Si4O12]8- 4-membered single rings (vierer-Einfachringe), |
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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 |
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09.CE.30c Karupmollerite-Ca! (Na,Ca,K)2Ca(Nb,Ti)4(Si4O12)2(O,OH)4•7(H2O) C 2/m 2/m |
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09.CE.30c Kuzmenkoite-Zn! K2Zn(Ti,Nb)4(Si4O12)2(OH,O)4•6-8(H2O) Cm m |
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09.CE.30c Kuzmenkoite-Mn! (K,Na)2(Mn,Fe)(Ti,Nb)4[Si4O12]2(OH)4•5(H2O) C 2/m 2/m |
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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 |
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09.CE.30c Lepkhenelmite-Zn! Ba2Zn(Ti,Nb)4(Si4O12)2(O,OH)4•7(H2O) Cm m |
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09.CE.30c Gjerdingenite-Ca! K2Ca(Nb,Ti)4(Si4O12)2(O,OH)4•6H2O C 2/m 2/m |
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09.CE.30c Gjerdingenite-Na! (K,Na)2Na(Nb,Ti)4(Si4O12)2(OH,O)4•5H2O C 2/m 2/m |
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09.CE.30c Burovaite-Ca! (K,Na)4Ca2(Ti,Nb)8[Si4O12]4(OH,O)8•12H2O C 2/m 2/m |
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Other Burovaite-Ca Information
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| 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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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:
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