Vuoriyarvite-K Mineral Data

Vuoriyarvite-K Mineral Data +

General Vuoriyarvite-K Information

Chemical Formula:

(K,Na)2(Nb,Ti)2Si4O12(O,OH)2·4(H2O)

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

Empirical Formula:

KNa_0.6Ba_0.1Nb_1.8Ti_0.1Si₄O_13.7(OH)_0.5·4.2(H₂O)

Environment:

The mineral formed by the hydrothermal alteration of pyrochlore.

IMA Status:

Approved IMA 1995 (Dana # Added)

Locality:

Lake Vuoriyarvi and the Vuoriyarvi alkali-ultramafic complex, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

The name reflects the discovery locality.

Synonym:

IMA1995-031

IMA2000-A

Vuoriyarvite

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Vuoriyarvite-K Crystallography

Axial Ratios:

a:b:c =1.0372:1:0.5548

Cell Dimensions:

a = 14.692, b = 14.164, c = 7.859, Z = 4; beta = 117.87° V = 1,445.74 Den(Calc)= 3.01

Crystal System:

Monoclinic - DomaticH-M Symbol (m) Space Group: Cm

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

By Intensity(I/I_o): 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

Cleavage:

None

Color:

White.

Density:

2.95

Diaphaniety:

Translucent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

4.5 - Between Fluorite and Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Vuoriyarvite-K

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

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

Electron Density:

r_electron=2.88 gm/cc
note: r_{Vuoriyarvite-K}=2.95 gm/cc.

Fermion Index

Fermion Index = 0.01292
Boson Index = 0.98708

Photoelectric:

PE_{Vuoriyarvite-K}= 47.12 barns/electron
U=PE_{Vuoriyarvite-K} x r_electron= 135.66 barns/cc.

Radioactivity:

GRapi = 84.12 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Vuoriyarvite-K - barely detectable

Vuoriyarvite-K Classification

Dana Class:

60.1.3b.1 (60)Cyclosilicate Four-Membered Rings

(60.1)as Titanosilicates

(60.1.3b)Labuntsovite Group (Vuoriyarvite subgroup Monoclinic [Cm])

60.1.3b.1 Vuoriyarvite-K ! (K,Na)2(Nb,Ti)2Si4O12(O,OH)2·4(H2O) Cm m

60.1.3b.2 Tsepinite-Na! (Na,H3O,K,Sr,Ba)2(Ti,Nb)2[Si4O12](OH,O)2·3(H2O) Cm m

60.1.3b.3 Tsepinite-K! (K,Ba,Na)2(Ti,Nb)2(Si4O12)(OH,O)2·3(H2O) Cm m

60.1.3b.4 Tsepinite-Ca! (Ca,K,Na,[])2(Ti,Nb)2(Si4O12)(OH,O)2·4(H2O) C 2/m 2/m

60.1.3b.5 Paratsepinite-Ba! (Ba,Na,K)2-x(Ti,Nb)2(Si4O12)(OH,O)2·4(H2O) C 2/m 2/m

Strunz Class:

VIII/E.07-40 VIII - Silicates

VIII/E - Cyklosilicates, quadruplet rings [Si4O11]8-

VIII/E.07 - Labuntsovite Group

VIII/E.07-10 Korobitsynite! Na3(Ti,Nb)2[Si4O12](OH,O)2·3-4(H2O) Pbam 2/m 2/m 2/m

VIII/E.07-20 Nenadkevichite (Na,Ca,K)(Nb,Ti)Si2O6(O,OH)·2(H2O) Pbam 2/m 2/m 2/m

VIII/E.07-30* Strontiochevkinite (Sr,REE)4Fe(Ti,Zr)2Ti2Si4O22 C 2/a 2/m

VIII/E.07-30 Tsepinite-Na! (Na,H3O,K,Sr,Ba)2(Ti,Nb)2[Si4O12](OH,O)2·3(H2O) Cm m

VIII/E.07-32 Tsepinite-K! (K,Ba,Na)2(Ti,Nb)2(Si4O12)(OH,O)2·3(H2O) Cm m

VIII/E.07-33 Tsepinite-Ca! (Ca,K,Na,[])2(Ti,Nb)2(Si4O12)(OH,O)2·4(H2O) C 2/m 2/m

VIII/E.07-34 Paratsepinite-Ba! (Ba,Na,K)2-x(Ti,Nb)2(Si4O12)(OH,O)2·4(H2O) C 2/m 2/m

VIII/E.07-40 Vuoriyarvite-K (K,Na)2(Nb,Ti)2Si4O12(O,OH)2·4(H2O) Cm m

VIII/E.07-50 Clinophosinaite! Na3CaPSiO7 P 2/c 2/m

VIII/E.07-50* Kuzmenkoite-Zn! K2Zn(Ti,Nb)4(Si4O12)2(OH,O)4·6-8(H2O) Cm m

VIII/E.07-60* Kuzmenkoite-Mn! (K,Na)2(Mn,Fe)(Ti,Nb)4[Si4O12]2(OH)4·5(H2O) C 2/m 2/m

VIII/E.07-60 Phosinaite-(Ce)! Na13Ca2Ce[Si4O12](PO4)4 P 22121 2 2 2

VIII/E.07-70 Gjerdingenite-Fe! K2[(H2O)2(Fe,Mn)][(Nb,Ti)4(Si4O12)2(O,OH)4]·4(H2O) C 2/m 2/m

VIII/E.07-80 Gjerdingenite-Mn! (K,Na)2(Mn,Fe)(Nb,Ti)4(Si4O12)2(O,OH)4·6(H2O) C 2/m 2/m

VIII/E.07-90 Karupmollerite-Ca! (Na,Ca,K)2Ca(Nb,Ti)4(Si4O12)2(O,OH)4·7(H2O) C 2/m 2/m

VIII/E.07-100 Lemmleinite-K! NaK2(Ti,Nb)2Si4O12(O,OH)2·2(H2O) C 2/m 2/m

VIII/E.07-110 Lemmleinite-Ba! Na2K2Ba1-xTi4(Si4O12)2(O,OH)4·5(H2O) C 2/m 2/m

VIII/E.07-130 Paralabuntsovite-Mg! Na8K8Mg8Ti16(Si4O12)8(O,OH)16·n(H2O) I2/m 2/m

VIII/E.07-140 Labuntsovite-Mg! Na4K4(Ba,K)(Mg,Fe)1xTi8(Si4O12)4(O,OH)8·10(H2O) C 2/m 2/m

VIII/E.07-150 Labuntsovite-Fe! Na4K4(Ba,K)2(Fe,Mg,Mn)1xTi8(Si4O12)4(O,OH)8·10(H2O) C 2/m 2/m

VIII/E.07-155 Labuntsovite-Mn Na4K4(Ba,K)(Mn,Fe)1x(Ti,Nb)8[Si4O12]4(O,OH)8·n(H2O),n=10-12 I2/m 2/m

VIII/E.07-170 Parakuzmenkoite-Fe! (K,Ba)2Fe(Ti,Nb)4(Si4O12)2(O,OH)4·7(H2O) C 2/m 2/m

VIII/E.07-180 Organovaite-Zn! K2Zn(Nb,Ti)4(Si4O12)2(O,OH)4·6(H2O) C 2/m 2/m

VIII/E.07-190 Organovaite-Mn! K2Mn(Nb,Ti)4(Si4O12)2(O,OH)4·6(H2O) Cm m

VIII/E.07-200 Gutkovaite-Mn! CaK2Mn(Ti,Nb)4(Si4O12)2(O,OH)4·5(H2O) Cm m

VIII/E.07-205 Neskevaaraite-Fe! NaK3Fe(Ti,Nb)4(Si4O12)2(O,OH)4·6(H2O) Cm m

VIII/E.07-210 Alsakharovite-Zn! NaSrKZn(Ti,Nb)4(Si4O12)2(O,OH)4·7(H2O) Cm m

VIII/E.07-220 Lepkhenelmite-Zn! Ba2Zn(Ti,Nb)4(Si4O12)2(O,OH)4·7(H2O) Cm m

Other Vuoriyarvite-K Information

References:

NAME( CanMin, 8/99) PHYS. PROP.(AmMin, Vol 83, p 1349) OPTIC PROP.(AmMin, Vol 83, p 1349)

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 -Google Images 6 -Google Scholar 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas

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Vuoriyarvite-K

(K,Na)2(Nb,Ti)2Si4O12(O,OH)2·4(H2O)
Dana No: 60.1.3b.1 Strunz No: VIII/E.07-40
Locality:

Notes: