Natalyite Mineral Data

Natalyite Mineral Data +

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

IMA Status:

Approved IMA 1985

Locality:

Link to MinDat.org Location Data.

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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),

Physical Properties of Natalyite

Cleavage:

[110] Distinct

Color:

Yellow green, Light green.

Density:

3.55

Diaphaniety:

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

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:

r_electron=3.46 gm/cc
note: r_Natalyite=3.55 gm/cc.

Fermion Index

Fermion Index = 0.01766
Boson Index = 0.98234

Photoelectric:

PE_Natalyite= 5.57 barns/electron
U=PE_Natalyite x r_electron= 19.27 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Natalyite is Not Radioactive

Natalyite Classification

Dana Class:

65.1.3c.5 (65)Inosilicate Single-Width Unbranched Chains, W=1

(65.1)with chains P=2

(65.1.3c)C2/c clinopyroxenes (Na clinopyroxenes)

65.1.3c.1 Jadeite Na(Al,Fe)Si2O6 C 2/c 2/m

65.1.3c.2 Aegirine NaFeSi2O6 C 2/c 2/m

65.1.3c.3 Namansilite NaMn(Si2O6) C 2/c 2/m

65.1.3c.4 Kosmochlor NaCrSi2O6 C 2/c 2/m

65.1.3c.5 Natalyite Na(V,Cr)Si2O6 C 2/c 2/m

65.1.3c.6 Jervisite (Na,Ca,Fe)(Sc,Mg,Fe)Si2O6 C 2/c 2/m

Strunz Class:

VIII/F.01-160 VIII - Silicates

VIII/F - Inosilicates (chain and band) double chains [Si2O6]4-

VIII/F.01 - Pyroxene group, Clinopyroxene

VIII/F.01-10 Clinoenstatite Mg2Si2O6 P 2₁/c 2/m

VIII/F.01-20 Clinoferrosilite (Fe,Mg)2Si2O6 P 2₁/c 2/m

VIII/F.01-30 Kanoite (Mn,Mg)2Si2O6 P 2₁/c 2/m

VIII/F.01-40 Pigeonite (Mg,Fe,Ca)(Mg,Fe)Si2O6 P 2₁/c 2/m

VIII/F.01-50 Diopside CaMgSi2O6 C 2/c 2/m

VIII/F.01-60 Hedenbergite CaFeSi2O6 C 2/c 2/m

VIII/F.01-70 Johannsenite CaMnSi2O6 C 2/c 2/m

VIII/F.01-80 Petedunnite Ca(Zn,Mn,Fe,Mg)Si2O6 C 2/c 2/m

VIII/F.01-90 Augite (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al)2O6 C 2/c 2/m

VIII/F.01-100 Omphacite (Ca,Na)(Mg,Fe,Al)Si2O6 P 2/n 2/m

VIII/F.01-110 Esseneite CaFeAlSiO6 C 2/c 2/m

VIII/F.01-120 Spodumene LiAlSi2O6 C 2/c 2/m

VIII/F.01-130 Jadeite Na(Al,Fe)Si2O6 C 2/c 2/m

VIII/F.01-140 Aegirine NaFeSi2O6 C 2/c 2/m

VIII/F.01-145 Namansilite NaMn(Si2O6) C 2/c 2/m

VIII/F.01-150 Jervisite (Na,Ca,Fe)(Sc,Mg,Fe)Si2O6 C 2/c 2/m

VIII/F.01-160 Natalyite Na(V,Cr)Si2O6 C 2/c 2/m

VIII/F.01-170 Kosmochlor NaCrSi2O6 C 2/c 2/m

Other Natalyite Information

References:

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

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Natalyite

Na(V+++,Cr+++)Si2O6
Dana No: 65.1.3c.5 Strunz No: VIII/F.01-160
Locality:

Notes: