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Vuoriyarvite-K Mineral Data

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General Vuoriyarvite-K Information

Help on Chemical  Formula: Chemical Formula: (K,Na)2(Nb,Ti)2Si4O12(O,OH)2•4(H2O)
Help on Composition: Composition: Molecular Weight = 654.35 gm
   Potassium   5.98 %  K     7.20 % K2O
   Barium      2.10 %  Ba    2.34 % BaO
   Sodium      2.11 %  Na    2.84 % Na2O
   Titanium    0.73 %  Ti    1.22 % TiO2
   Niobium    25.56 %  Nb   36.56 % Nb2O5
   Silicon    17.17 %  Si   36.73 % SiO2
   Hydrogen    1.37 %  H    12.25 % H2O
   Oxygen     44.99 %  O
             ______        ______ 
             100.00 %       99.14 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: KNa0.6Ba0.1Nb1.8Ti0.1Si4O13.7(OH)0.5•4.2(H2O)
Help on Environment: Environment: The mineral formed by the hydrothermal alteration of pyrochlore.
Help on IMA Status: IMA Status: Approved IMA 1995 (Dana # Added)
Help on Locality: Locality: Lake Vuoriyarvi and the Vuoriyarvi alkali-ultramafic complex, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: The name reflects the discovery locality.
Help on Name Pronunciation: Name Pronunciation: Vuoriyarvite-K + Pronunciation Say VUORIYARVITE-K
Help on Synonym: Synonym: IMA1995-031

Vuoriyarvite-K Image

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Comments: Light tan, compact mass of vuoryarvite-K micro-crystals associated with calcite and greenish sodalite.
Location: Vein No. 46, Kirovskii apatite mine (Kirovsky Mine; Kirov Mine), Kukisvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: See Image.
© Rruff Database

Vuoriyarvite-K Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0372:1:0.5548
Help on Cell Dimensions: Cell Dimensions: a = 14.692, b = 14.164, c = 7.859, Z = 4; beta = 117.87° V = 1,445.74 Den(Calc)= 3.01
Help on Crystal System: Crystal System: Monoclinic - Domatic H-M Symbol (m) Space Group: Cm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.262(1)(421), 7.1(0.9)(020), 3.151(0.8)(041),4.98(0.6)(021), 2.956(0.6)(112), 1.723(0.4)(463,463,714,2.549(0.4)(441),

Physical Properties of Vuoriyarvite-K

Help on Cleavage: Cleavage: None
Help on Color: Color: White.
Help on Density: Density: 2.95
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Vuoriyarvite-K

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.042 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.061 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2285,KPDmeas= 0.2331,KC= 0.2433
Ncalc = 1.72 - 1.73
Help on Optical Data: Optical Data: Biaxial (+), a=1.649, b=1.655, g=1.759, bire=0.1100, 2V(Calc)=30, 2V(Meas)=20-28. Dispersion weak, r < v.

Calculated Properties of Vuoriyarvite-K

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.88 gm/cc
note: Specific Gravity of Vuoriyarvite-K =2.95 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEVuoriyarvite-K = 47.12 barns/electron
U=PEVuoriyarvite-K x relectron= 135.66 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 84.12 (Gamma Ray American Petroleum Institute Units)
Concentration of Vuoriyarvite-K per GRapi unit = 1.19 (%)

Estimated Radioactivity from Vuoriyarvite-K - barely detectable


Vuoriyarvite-K Classification

Help on  Dana Class: Dana Class: 60.01.03b.01 (60)Cyclosilicate Four-Membered Rings
  (60.01)as Titanosilicates
  (60.01.03b)Labuntsovite Group (Vuoriyarvite subgroup Monoclinic [Cm])
60.01.03b.01 Vuoriyarvite-K! (K,Na)2(Nb,Ti)2Si4O12(O,OH)2•4(H2O) Cm m
60.01.03b.02 Tsepinite-Na! (Na,H3O,K,Sr,Ba)2(Ti,Nb)2[Si4O12](OH,O)2•3(H2O) Cm m
60.01.03b.03 Tsepinite-K! (K,Ba,Na)2(Ti,Nb)2(Si4O12)(OH,O)2•3(H2O) Cm m
60.01.03b.04 Tsepinite-Ca! (Ca,K,Na,[])2(Ti,Nb)2(Si4O12)(OH,O)2•4(H2O) C 2/m 2/m
60.01.03b.05 Paratsepinite-Ba! (Ba,Na,K)2-x(Ti,Nb)2(Si4O12)(OH,O)2•4(H2O) C 2/m 2/m
60.01.03b.06 Tsepinite-Sr! (Sr,Ba,K)(Ti,Nb)2(Si4O12)(OH,O)2•3(H2O) Cm m
Help on  Strunz Class: Strunz Class: 09.CE.30b 09 - SILICATES (Germanates)
  09.C - Cyclosilicates
  09.CE -[Si4O12]8- 4-membered single rings (vierer-Einfachringe),
09.CE.30b Vuoriyarvite-K! (K,Na)2(Nb,Ti)2Si4O12(O,OH)2•4(H2O) Cm m
09.CE.30b Tsepinite-Sr! (Sr,Ba,K)(Ti,Nb)2(Si4O12)(OH,O)2•3(H2O) Cm m
09.CE.30b Tsepinite-Ca! (Ca,K,Na,[])2(Ti,Nb)2(Si4O12)(OH,O)2•4(H2O) C 2/m 2/m
09.CE.30b Tsepinite-K! (K,Ba,Na)2(Ti,Nb)2(Si4O12)(OH,O)2•3(H2O) Cm m
09.CE.30b Tsepinite-Na! (Na,H3O,K,Sr,Ba)2(Ti,Nb)2[Si4O12](OH,O)2•3(H2O) Cm m

Other Vuoriyarvite-K Information

Help on References: References: NAME( CanMin, 8/99) PHYS. PROP.(AmMin, Vol 83, p 1349) OPTIC PROP.(AmMin, Vol 83, p 1349)
Help on See Also: See Also: Links to other databases for Vuoriyarvite-K :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: 60.01.03b.01 Strunz No: 09.CE.30b





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