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Bluish- to smoke- gray, ...
Named after Alfred Edward Ringwood (1930-1993), noted geochemist and Professor of Geology, Australian National University, Canberra. (
Polymorph of:
Olivine Group.
Mg analogue of ahrensite.

The isometric polymorph of Wadsleyite and Forsterite.

Classification of Ringwoodite

Approved 1968

9 : SILICATES (Germanates)
A : Nesosilicates
C : Nesosilicates without additional anions; cations in octahedral [6] coordination

51 : NESOSILICATES Insular SiO4 Groups Only
3 : Insular SiO4 Groups Only with all cations in octahedral [6] coordination

14 : Silicates not Containing Aluminum
21 : Silicates of Fe and Mg URL:
Please feel free to link to this page.

Type Occurrence of Ringwoodite

Place of Conservation of Type Material:
The Natural History Museum, London, England, 1935,792.
Year of Discovery:
Geological Setting of Type Material:
Tenham meteorite
Associated Minerals at Type Locality:

Occurrences of Ringwoodite

Geological Setting:
Meteorites, Inclusion in terrestrial diamond

Physical Properties of Ringwoodite

Diaphaneity (Transparency):
Bluish- to smoke- gray, purple, colourless
3.9 g/cm3 (Calculated)

Crystallography of Ringwoodite

Crystal System:
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Cell Parameters:
a = 8.113Å
Unit Cell Volume:
V 534.00 ų (Calculated from Unit Cell)
Rounded grains, to 100 μm, or massive
X-Ray Powder Diffraction Data:
2.447 (100)
1.434 (60)
2.028 (40)
2.872 (20)
1.560 (20)
1.0559 (10)
0.8283 (10)

Optical Data of Ringwoodite

RI values:
n = 1.768
Max Birefringence:
δ = 0.000 - Isotropic minerals have no birefringence
Surface Relief:

Chemical Properties of Ringwoodite

Essential elements:
All elements listed in formula:
Common Impurities:

Relationship of Ringwoodite to other Species

9.AC.20ChesnokoviteNa2[SiO2(OH)2] · 8H2O
14.21.7 Magnesiocummingtonite

Other Names for Ringwoodite

Name in Other Languages:
Simplified Chinese:林伍德石
Traditional Chinese:林伍德石

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Industrial Uses:

References for Ringwoodite

Reference List:
Binns, R.A., Davis, R.J., and Reed, S.J.B. (1969) Ringwoodite, natural (Mg,Fe)2SiO4 spinel in the Tenham meteorite. Nature: 221: 943-944.

American Mineralogist (1969): 54: 1219.

Coleman, L.C. (1977) Ringwoodite and majorite in the Catherwood meteorite. Canadian Mineralogist: 15: 97-101.

Boctor, N.Z., Bell, P.M., and Mao, H.K. (1982) Petrology and shock metamorphism of Pampa del Infierno chondrite. Geochimica et Cosmochimica Acta: 46: 1903-1911.

Sinogeikin, S.V., Katsura, T., and Bass, J.D. (1998) Sound velocities and elastic properties of Fe-bearing wadsleyite and ringwoodite. Journal of Geophysical Research: 103: 20819-20825.

Pearson, D.G. et al. "Hydrous mantle transition zone indicated by ringwoodite included within diamond" letter to Nature; Nature 507, 221–224 (13 March 2014)

Thomas, S.-M., Jacobsen, S.D., Bina C.R., Reichart, P., Moser, M., Hauri, E.H., Koch-Müller, M., Smyth, J.R., Dollinger, G. (2015): Quantification of water in hydrous ringwoodite. Frontiers in Earth Science, 2, 1-10.

Mineral hints at bright blue rocks deep in the Earth
By Simon Redfern

Internet Links for Ringwoodite

Localities for Ringwoodite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
  • Eastern Antarctica
    • American Highland
      • Grove Mts
YT Lin, Lu Feng, Sen Hu (2011) High Pressure Mineral Assemblages in the Lherzolitic Shergottite Grove Mountains (GRV) 020090. Japan Geooscience Union Meeting Makuhari, Chiba Japan.
Feng, L., Lin, Y., Hu, S., Xu, L. & Miao, B. Estimating compositions of natural ringwoodite in the heavily shocked Grove Mountains 052049 meteorite from Raman spectra. Am. Mineral. 96, 1480–1489 (2011)
Lu Feng, Masaaki Miyahara, Toshiro Nagase, Eiji Ohtani, Sen Hu, Ahmed El Goresy, Yangting Lin (2011) Shock Conditions and Formation Mechanism of Akimotoite-Pyroxene Glass Assemblages in the Grove Mountains (GRV) 052082. Japan Geooscience Union Meeting Makuhari, Chiba Japan.
    • Victoria Land
      • Elephant Morraine
Walton, E. L. (2013) Shock metamorphism of Elephant Moraine A79001: Implications for olivine-ringwoodite transformation and the complex thermal history of heavily shocked Martian meteorites. Geochimica et Cosmochimica Acta 107:299-315. (Apr 2013).
  • Chaco
    • Almirante Brown Department
      • Pampa del Infierno
Geochimica et Cosmochimica Acta: 46: 1903-1911.
Australia (TL)
  • Queensland
    • Charters Towers Region
      • South Gregory
        • Tenham Station
CM 15 (1977), 97; HB2/2 (1995); Nature 1969, 943-4; T. Ferroir, M. Miyahara, E. Ohtani, P.Beck, A. Simionovici P. Gillet and A. El Goresy 72nd Meeting of the Meteoritical Society: Abstracts Page A69 No. 5143
  • Western Australia
    • Dundas Shire
      • Rawlinna
Smith, J. V.; Mason, Brian 1970 Pyroxene-Garnet Transformation in Coorara Meteorite. Science, Volume 168, Issue 3933, pp. 832-833
  • Mato Grosso
Pearson, D.G. et al. "Hydrous mantle transition zone indicated by ringwoodite included within diamond" letter to Nature; Nature 507, 221–224 (13 March 2014)
  • Alberta
    • Peace River
Canadian Mineralogist Vol. 21, pp. 29-35 (1983)
  • Saskatchewan
    • Catherwood
Canadian Mineralogist (1977): 15: 97-101.
  • Hebei Province
    • Zhangjiakou Prefecture
      • Wanquan Co.
Hongsen Xie, Huifen Zhang, Yueming Zhang, Huigang Xu, Shijie Zhuang (1984): Acta Mineralogica Sinica 4(4), 289-295
  • Hubei Province
    • Suizhou Prefecture
      • Zengdu District (Cengdou District)
        • Xihe
American Mineralogist (2000): 85: 1564.; Xie Xiande, Chen Ming, Wang Deqiang, A. El Goresy (2001): NaAlSi3O8-hollandite and other high-pressure minerals in the shock melt veins of the Suizhou meteorite. Chinese Science Bulletin 46, 1116-1125.
  • Jiangsu Province
    • Taizhou Prefecture
      • Gaogang District
        • Sixiangkou
Zhang, A., et al (2006): Lunar and Planetary Science, 37, 1069; Miyajima, N., El Goresy, A., Dupas-Bruzek, C., Seifert, F., Rubie, D.C., Chen, M., Xie, X. (2007): Ferric iron in Al-bearing akimotoite coexisting with iron-nickel metal in a shock-melt vein in an L-6 chondrite. American Mineralogist, 92, 1545-1549.; Chen, M., El Goresy, A. & Gillet, P. Ringwoodite lamellae in olivine: clues to olivine–ringwoodite phase transition mechanisms in shocked meteorites and subducting slabs. Proc. Natl Acad. Sci. USA 101, 15033–15037 (2004)
  • Al Jabal al Gharbi District
  • Dhofar Governorate (Al Janubiyah Province)
D.D. Badjukov et al. , Lunar and Planetary Science, XXXVI (2005), 1684.pdf
  • New Mexico
    • De Baca Co.
    • Harding Co.
Zhidong Xie et al. , Lunar and Planetary Science XXXVI (2005), 1216.pdf
    • Roosevelt Co.
      • Rogers
  • Oregon
    • Josephine Co.
      • Josephine Creek District
  • Texas
    • Randall Co.
Zhidong Xie et al. , Lunar and Planetary Science XXXVI (2005), 1216.pdf
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