Wadsleyite Mineral Data

Advertisment

Our Mission is Simple: RMS will be the go-to portal for all Mineral, Gem and Rock shows in the USA

General Wadsleyite Information

Chemical Formula:

(Mg,Fe++)2SiO4

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

Empirical Formula:

Mg_1.5Fe²⁺_0.5SiO₄

Environment:

In fragments within a vein in a "hypersthene"-olivine chondritic meteorite, believed to have formed during an extraterrestrial shock event.

IMA Status:

Approved IMA 1983

Locality:

Peace River meteorite. Link to MinDat.org Location Data.

Name Origin:

Named for A.D. Wadsley (1918-1969).

Name Pronunciation:

Wadsleyite + Pronunciation

Synonym:

ICSD 66490

IMA1982-012

PDF 37-415

Wadsleyite Image

Images:

Wadsleyite

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

Wadsleyite Crystallography

Axial Ratios:

a:b:c =0.4896:1:0.713

Cell Dimensions:

a = 5.6715, b = 11.582, c = 8.258, Z = 8; beta = 90.397° V = 542.43 Den(Calc)= 3.83

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: I2/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.45(1), 2.04(0.7), 1.44(0.6),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Baur W H , American Mineralogist , 57 (1972) p.709-731, Computer-simulated crystal structures of observed and hypothetical Mg2SiO4, Polymorphs of low and high density

View Additional jPOWD Structure files for Wadsleyite
[1] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [2] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] [3] [30] [31] [32] [33] [34] [4] [5] [6] [7] [8] [9]

Physical Properties of Wadsleyite

Color:

Light gray.

Density:

3.84

Optical Properties of Wadsleyite

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

Optical Data:

Biaxial (?), b=1.76

Calculated Properties of Wadsleyite

Electron Density:

Bulk Density (Electron Density)=3.77 gm/cc
note: Specific Gravity of Wadsleyite =3.83 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_Wadsleyite= 6.48 barns/electron
U=PE_Wadsleyite x rElectron Density= 24.43 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Wadsleyite is Not Radioactive

Wadsleyite Classification

Dana Class:

51.03.04.01 (51)Nesosilicate Insular SiO4 Groups Only

(51.03)with all cations in octahedral [6] coordination

(51.03.04)Dana Group

51.03.04.01 Wadsleyite (Mg,Fe)2SiO4 I2/m 2/m

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

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Am.Min.,Vol.82,p270-275,1997) OPTIC PROP.(Am.Min.,Vol.82,p270-275,1997)

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
16 - WWW-MINCRYST

Search for Wadsleyite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Wadsleyite :

Dakota Matrix Minerals Google Search for Wadsleyite
John Betts Fine Minerals Search for Wadsleyite
McDougall Minerals Google Search for Wadsleyite
Rock and Mineral Shows Google Search for Wadsleyite
Weinrich Minerals, Inc. Google Search for Wadsleyite

Ask about Wadsleyite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Wadsleyite Specimen Label here :

Wadsleyite

(Mg,Fe++)2SiO4
Dana No: 51.03.04.01 Strunz No: 09.BE.02
Locality:

Notes: