Natalyite Mineral Data

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General Natalyite Information

Chemical Formula:

Na(V+++,Cr+++)Si2O6

Composition:

Molecular Weight = 226.36 gm

Sodium 10.16 % Na 13.69 % Na₂O

Vanadium 16.88 % V 24.83 % V₂O₃

Chromium 5.74 % Cr 8.39 % Cr₂O₃

Silicon 24.81 % Si 53.09 % SiO₂

Oxygen 42.41 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

NaV³⁺_0.75Cr_0.25Si₂O₆

Environment:

In Cr, V-rich diopside-quartz rocks that are part of a Precambrian metamorphic complex (Slyudyanka complex, Russia).

IMA Status:

Approved IMA 1985

Locality:

From the Pereval marble quarry, near Slyudyanka, Lake Baikal, Siberia, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for Nataliya Vasil'evna Frolova (1907-1960), geologist, Irkutsk University, Irkutsk, Russia.

Name Pronunciation:

Natalyite + Pronunciation

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Natalyite Crystallography

Axial Ratios:

a:b:c =1.0986:1:0.6043

Cell Dimensions:

a = 9.58, b = 8.72, c = 5.27, Z = 4; beta = 107.16° V = 420.65 Den(Calc)= 3.57

Crystal System:

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

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

By Intensity(I/I_o): 2.52(1), 2.96(1), 2.87(0.8),

Crystal Structure:

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Secco L , Martignago F , Dal Negro A , Reznitskii L Z , Sklyarov E V , American Mineralogist , 87 (2002) p.709-714, Crystal chemistry of Cr-V-rich clinopyroxenes, Sample 4

Physical Properties of Natalyite

Cleavage:

{110} Distinct

Color:

Yellow green, Light green.

Density:

3.55

Diaphaneity:

Transparent

Hardness:

7 - Quartz

Luster:

Vitreous - Silky

Streak:

green

Optical Properties of Natalyite

Gladstone-Dale:

CI meas= 0.076 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.081 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2115,KPDmeas= 0.2127,KC= 0.23
Ncalc = 1.82

Optical Data:

Biaxial (-), a=1.741, b=1.762, g=1.762, bire=0.0210, 2V(Calc)=0, 2V(Meas)=8-12.

Calculated Properties of Natalyite

Electron Density:

Bulk Density (Electron Density)=3.46 gm/cc
note: Specific Gravity of Natalyite =3.55 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Natalyite= 5.57 barns/electron
U=PE_Natalyite x rElectron Density= 19.27 barns/cc.

Radioactivity:

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

Natalyite Classification

Dana Class:

65.01.03c.05 (65)Inosilicate Single-Width Unbranched Chains, W=1

(65.01)with chains P=2

(65.01.03c)C2/c clinopyroxenes (Na clinopyroxenes)

65.01.03c.01 Jadeite Na(Al,Fe)Si2O6 C 2/c 2/m

65.01.03c.02 Aegirine NaFeSi2O6 C 2/c 2/m

65.01.03c.03 Namansilite NaMn(Si2O6) C 2/c 2/m

65.01.03c.04 Kosmochlor NaCrSi2O6 C 2/c 2/m

65.01.03c.05 Natalyite Na(V,Cr)Si2O6 C 2/c 2/m

65.01.03c.06 Jervisite (Na,Ca,Fe)(Sc,Mg,Fe)Si2O6 C 2/c 2/m

Strunz Class:

09.DA.25 09 - SILICATES (Germanates)

09.D - Inosilicates* Structural terminology according to Liebau (1985)

09.DA -Inosilicates with 2-periodic single chains, Si2O6; pyroxene family

09.DA.25 Aegirine NaFeSi2O6 C 2/c 2/m

09.DA.25 Jadeite Na(Al,Fe)Si2O6 C 2/c 2/m

09.DA.25 Kosmochlor NaCrSi2O6 C 2/c 2/m

09.DA.25 Jervisite (Na,Ca,Fe)(Sc,Mg,Fe)Si2O6 C 2/c 2/m

09.DA.25 Namansilite NaMn(Si2O6) C 2/c 2/m

09.DA.25 Natalyite Na(V,Cr)Si2O6 C 2/c 2/m

Other Natalyite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

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

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Print or Cut-and-Paste your Natalyite Specimen Label here :

Natalyite

Na(V+++,Cr+++)Si2O6
Dana No: 65.01.03c.05 Strunz No: 09.DA.25
Locality:

Notes: