Mineralogy Database

Pyroxmangite Mineral Data

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General Pyroxmangite Information

Help on Chemical  Formula: Chemical Formula: (Mn,Fe++)SiO3
Help on Composition: Composition: Molecular Weight = 131.20 gm
   Manganese  33.50 %  Mn   43.25 % MnO
   Iron        8.51 %  Fe   10.95 % FeO
   Silicon    21.41 %  Si   45.79 % SiO2
   Oxygen     36.58 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+0.8Fe2+0.2SiO3
Help on Environment: Environment: Metamorphic and contact metasomatism of Mn-bearing rocks. Forms a series with pyroxferroite
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1913
Help on Locality: Locality: Tunaberg, Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its resemblance to the pyroxenes and containing manganese.
Help on Name Pronunciation: Name Pronunciation: Pyroxmangite + Pronunciation Say PYROXMANGITE
Help on Synonym: Synonym: ICSD 34159
  PDF 29-895

Pyroxmangite Image

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Comments: Pinkish red nearly opaque crystalline pyroxmangite.
Location: Shidara, Kitashidara-Gun, Aichi, Japan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Pyroxmangite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8886:1:2.298
Help on Cell Dimensions: Cell Dimensions: a = 6.721, b = 7.563, c = 17.38, Z = 14; alpha = 113.17°, beta = 82.27°, gamma = 94.13° V = 802.71 Den(Calc)= 3.80
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.95(1), 2.18(0.7), 3.12(0.6),

Physical Properties of Pyroxmangite

Help on Cleavage: Cleavage: {110} Perfect, {110} Perfect
Help on Color: Color: Pink, Rose pink, Purplish pink, Yellowish red brown, Brown.
Help on Density: Density: 3.8
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 5.5-6 - Knife Blade-Orthoclase
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Pearly
Help on Magnetism: Magnetism: Magnetic after heating
Help on Streak: Streak: white

Optical Properties of Pyroxmangite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.027 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.024 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1961,KPDmeas= 0.1956,KC= 0.2011
Ncalc = 1.76
Help on Optical Data: Optical Data: Biaxial (+), a=1.726-1.748, b=1.728-1.75, g=1.744-1.764, bire=0.0160-0.0180, 2V(Calc)=40-42, 2V(Meas)=35-46. Dispersion r > v moderate.

Calculated Properties of Pyroxmangite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.65 gm/cc
note: Specific Gravity of Pyroxmangite =3.79 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEPyroxmangite = 11.99 barns/electron
U=PEPyroxmangite x rElectron Density= 43.78 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Pyroxmangite is Not Radioactive

Pyroxmangite Classification

Help on  Dana Class: Dana Class: (65)Inosilicate Single-Width Unbranched Chains, W=1
  (65.06)with chains P=7
  (65.06.01)Pyroxmangite group Pyroxmangite (Mn,Fe)SiO3 P1 1 Pyroxferroite (Fe,Mn)7[Si7O21] P1 1
Help on  Strunz Class: Strunz Class: 09.DO.05 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DO -Inosilicates with 7-, 8-, 10-, 12- and 14-periodic chains
09.DO.05 Pyroxmangite (Mn,Fe)SiO3 P1 1
09.DO.05 Pyroxferroite (Fe,Mn)7[Si7O21] P1 1

Other Pyroxmangite Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Pyroxmangite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - HyperPhysics
12 - MinDAT
13 - Mineral and Gemstone Kingdom
14 - Mineralienatlas (Deutsch)
15 - Online Mineral Museum
16 - QUT Mineral Atlas
17 - Ruff.Info
18 - University of Colorado - Mineral Structure Data

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Dana No: Strunz No: 09.DO.05





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