Mineralogy Database

Wadsleyite Mineral Data

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General Wadsleyite Information

Help on Chemical  Formula: Chemical Formula: (Mg,Fe++)2SiO4
Help on Composition: Composition: Molecular Weight = 156.46 gm
   Magnesium  23.30 %  Mg   38.64 % MgO
   Iron       17.85 %  Fe   22.96 % FeO
   Silicon    17.95 %  Si   38.40 % SiO2
   Oxygen     40.90 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg1.5Fe2+0.5SiO4
Help on Environment: Environment: In fragments within a vein in a "hypersthene"-olivine chondritic meteorite, believed to have formed during an extraterrestrial shock event.
Help on IMA Status: IMA Status: Approved IMA 1983
Help on Locality: Locality: Peace River meteorite. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for A.D. Wadsley (1918-1969).
Help on Name Pronunciation: Name Pronunciation: Wadsleyite + Pronunciation Say WADSLEYITE
Help on Synonym: Synonym: ICSD 66490
  PDF 37-415

Wadsleyite Image

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Comments: Synthetic wadsleyite crystals.
Location: None, laboratory grown. Scale: See Image.
© Rruff Database

Wadsleyite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4896:1:0.713
Help on Cell Dimensions: Cell Dimensions: a = 5.6715, b = 11.582, c = 8.258, Z = 8; beta = 90.397° V = 542.43 Den(Calc)= 3.83
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: I2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.45(1), 2.04(0.7), 1.44(0.6),

Physical Properties of Wadsleyite

Help on Color: Color: Light gray.
Help on Density: Density: 3.84

Optical Properties of Wadsleyite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.012 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.009 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1984,KPDmeas= 0.1979,KC= 0.2003
Ncalc = 1.77
Help on Optical Data: Optical Data: Biaxial (?), b=1.76

Calculated Properties of Wadsleyite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.77 gm/cc
note: Specific Gravity of Wadsleyite =3.83 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEWadsleyite = 6.48 barns/electron
U=PEWadsleyite x rElectron Density= 24.43 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Wadsleyite is Not Radioactive

Wadsleyite Classification

Help on  Dana Class: Dana Class: (51)Nesosilicate Insular SiO4 Groups Only
  (51.03)with all cations in octahedral [6] coordination
  (51.03.04)Dana Group Wadsleyite (Mg,Fe)2SiO4 I2/m 2/m
Help on  Strunz Class: Strunz Class: 09.BE.02 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BE -Si2O7 groups with additional anions;
09.BE.02 Wadsleyite (Mg,Fe)2SiO4 I2/m 2/m

Other Wadsleyite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Am.Min.,Vol.82,p270-275,1997) OPTIC PROP.(Am.Min.,Vol.82,p270-275,1997)
Help on See Also: See Also: Links to other databases for Wadsleyite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - CalTech Mineral Spectroscopy
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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Dana No: Strunz No: 09.BE.02





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