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Namansilite Mineral Data

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General Namansilite Information

Help on Chemical  Formula: Chemical Formula: NaMn+++(Si2O6)
Help on Composition: Composition: Molecular Weight = 230.10 gm
   Sodium      9.99 %  Na   13.47 % Na2O
   Manganese  23.88 %  Mn   34.31 % Mn2O3
   Silicon    24.41 %  Si   52.23 % SiO2
   Oxygen     41.72 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: NaMn3+Si2O6
Help on Environment: Environment: In low-grade metamorphosed and highly oxidized Mn, Na-rich sediments.
Help on IMA Status: IMA Status: Approved IMA 1992
Help on Locality: Locality: From the Irnimi deposit, Taikan Mountains, Khabarovsk Territory, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the sodium, NAtrium; MANganese; and SILicon in the formula.
Help on Name Pronunciation: Name Pronunciation: Namansilite + Pronunciation Say NAMANSILITE
Help on Synonym: Synonym: IMA1989-026

Namansilite Image

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Comments: Dark red namansilite veinlets in rock (slabbed specimen).
Location: Woods mine, near Tamworth, New South Wales, Australia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Namansilite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.1042:1:0.6217
Help on Cell Dimensions: Cell Dimensions: a = 9.513, b = 8.615, c = 5.356, Z = 4; beta = 105.12° V = 423.75 Den(Calc)= 3.61
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.584(1), 2.501(0.9), 2.927(0.9),

Physical Properties of Namansilite

Help on Cleavage: Cleavage: {???} Perfect
Help on Color: Color: Brownish red, Violet red.
Help on Density: Density: 3.6
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 6-7 - Orthoclase-Quartz
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: brown red

Optical Properties of Namansilite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.083 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.086 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2172,KPDmeas= 0.2178,KC= 0.2375
Ncalc = 1.85 - 1.86
Help on Optical Data: Optical Data: Biaxial (-), a=1.746, b=1.769, g=1.837, bire=0.0910, 2V(Calc)=64, 2V(Meas)=15-20.

Calculated Properties of Namansilite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.50 gm/cc
note: Specific Gravity of Namansilite =3.60 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PENamansilite = 7.18 barns/electron
U=PENamansilite x rElectron Density= 25.16 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Namansilite is Not Radioactive

Namansilite Classification

Help on  Dana Class: Dana Class: 65.01.03c.03 (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
Help on  Strunz Class: 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 Namansilite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Am.Min.,Vol.78,p1316,1993) OPTIC PROP.(Am.Min.,Vol.78,p1316,1993)
Help on See Also: See Also: Links to other databases for Namansilite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: 65.01.03c.03 Strunz No: 09.DA.25





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