Ringwoodite Mineral Data + 
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- 51.3.3.1 Ringwoodite Mg2SiO4 F d3m 4/m 3 2/m
- VIII/A.06-10 Wadsleyite (Mg,Fe)2SiO4 I2/m 2/m
- VIII/A.06-20 Ringwoodite Mg2SiO4 F d3m 4/m 3 2/m
General Ringwoodite Information |
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 Chemical Formula: |
Mg2SiO4 | ||
| Composition: |
Molecular Weight = 140.69 gm | ||
| Magnesium 34.55 % Mg 57.29 % MgO | |||
| Silicon 19.96 % Si 42.71 % SiO2 | |||
| Oxygen 45.49 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Mg2(SiO4) | ||
| Environment: |
Chondrite meteorites. Polymorph of forsterite and replaces ferroan forsterite grains. | ||
| IMA Status: |
Approved IMA 1969 | ||
| Locality: |
Tenham, Austalia, chondrite. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for Alfred Edward Ringwood (1930-1993), petrologist, University of Canberra, Australia. | ||
| Synonym: |
ICSD 27531 | ||
| PDF 21-1258 | |||
Search for Ringwoodite Images | |||
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Images:
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Ringwoodite Crystallography |
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| Cell Dimensions: |
a = 8.113, Z = 8; V = 534.00 Den(Calc)= 3.50 | ||
| Crystal System: |
Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F d3m | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.447(1), 1.434(0.58), 2.028(0.58), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Ringwoodite |
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| Color: |
Blue gray, Colorless, Light violet, Purple, Smoky gray. | ||
| Density: |
3.9 | ||
| Habit: |
Anhedral Grains - Granular minerals without the expression of crystal shapes | ||
| Habit: |
Microscopic Crystals - Crystals visible only with microscopes. | ||
Optical Properties of Ringwoodite |
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| Gladstone-Dale: |
CI meas= 0.032 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= -0.079 (Fair) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2194,KPDmeas= 0.1969,KC= 0.2034 |
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| Optical Data: |
Isotropic, n=1.768. | ||
Calculated Properties of Ringwoodite |
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| Electron Density: |
relectron=3.88 gm/cc |
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| Fermion Index |
Fermion Index = 0.04409 Boson Index = 0.95591 |
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| Photoelectric: |
PERingwoodite = 1.53 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Ringwoodite is Not Radioactive |
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Ringwoodite Classification |
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| Dana Class: |
51.3.3.1 (51)Nesosilicate Insular SiO4 Groups Only | ||
| (51.3)with all cations in octahedral [6] coordination | |||
| (51.3.3)Dana Group | |||
| Strunz Class: |
VIII/A.06-20 VIII - Silicates | ||
| VIII/A - Nesosilicates with [SiO4]4-groups, cations of octahedral orientation [6] | |||
| VIII/A.06 - Wadsleyite series | |||
Other Ringwoodite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Ringwoodite : 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 Search for Ringwoodite using: Visit our Advertisers for Ringwoodite : AA Mineral SpecimensB & L Fine Minerals Crystal Vaults Dan Weinrich Fine Minerals Dan Weinrich Auctions e-Rocks Auctions Excalibur Minerals Exceptional Minerals Fabre Minerals Greenside Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club MineralsWeb Fine Minerals Rockshop.cz T G Fine Minerals Wrights Rock Shop Translate Ringwoodite Mineral Data : Ask about Ringwoodite here : Print or Cut-and-Paste your Ringwoodite Specimen Label here :
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