Namansilite Mineral Data + Say NAMANSILITE

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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 IMA Status: IMA Status: Approved IMA 1992
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Synonym: Synonym: IMA1989-026
 

Namansilite Image

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Namansilite

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 - PrismaticH-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),
Click Here for Large Namansilite Structure Window Crystal Structure:

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Ohashi H , Osawa T , Tsukimura K , Acta Crystallographica, Section C , 43 (1987) p.605-607, Refinement of the structure of manganese sodium dimetasilicate, Locality: synthetic, Note: pyroxene, Note: anisoB s from ICSD

 

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 Diaphaniety: Diaphaniety: 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
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:

relectron=3.50 gm/cc
note: rNamansilite =3.60 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.0116
Boson Index = 0.9884
Help on Photoelectric: Photoelectric:

PENamansilite = 7.18 barns/electron
U=PENamansilite x relectron= 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: 65.1.3c.3 (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
Help on  Strunz Class: Strunz Class: VIII/F.01-145 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 Namansilite Information

Help on References: References: 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 - Crocoite.com Mineral Locations 4 - EUROmin Project 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 - WWW-MINCRYST 15 -École des Mines de Paris

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Namansilite

NaMn+++(Si2O6)
Dana No: 65.1.3c.3 Strunz No: VIII/F.01-145
Locality:

 

Notes:

 

 
   
 
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