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Bridgmanite

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Formula:
(Mg,Fe)SiO
 
3
System:Orthorhombic
Name:
Named in 2014 by Chi Ma and Oliver Tschauner in honor of Percy Williams Bridgman [April 21, 1882 Cambridge, Massachusetts, USA - August 20, 1961 Randolph, New Hampshire, USA], winner of the Nobel Prize for Physics in 1946 for his work in high-pressure physics.
Dimorph of:Akimotoite


Perovskite-type high-pressure phase.

This mineral is believed to compose up to 93% of the lower mantle above around 2700km and therefore is probably the most abundant mineral in the Earth.

Classification of Bridgmanite

IMA status:Approved 2014
mindat.org URL:http://www.mindat.org/min-45900.html
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Type Occurrence of Bridgmanite

Type Locality:Tenham meteorite, Tenham Station, South Gregory, Charters Towers Region, Queensland, Australia
Place of Conservation of Type Material:In the collections of the Smithsonian Institution’s National Museum of Natural History, Washington DC, USA,registration number USNM 7703
Year of Discovery:2009
Geological Setting of type material:As submicrometer-sized crystals in shock-induced melt veins in the Tenham meteorite.

Occurrences of Bridgmanite

Geological Setting:Major constituent of the lower mantle

Crystallography of Bridgmanite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:Pnma
Space Group Setting:Pnma
Cell Parameters:a = 5.02(3) Å, b = 6.90(3) Å, c = 4.81(2) Å
Ratio:a:b:c = 0.728 : 1 : 0.697
Unit Cell Volume:V 166.61 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
2.456(100)
2.175(34)
2.081(37)
2.075(34)
1.924(37)
1.743(52)
1.444(41)
1.400(76)

Chemical Properties of Bridgmanite

Formula:
(Mg,Fe)SiO
 
3
Simplified for copy/paste:(Mg,Fe)SiO3
Essential elements:Mg, O, Si
All elements listed in formula:Fe, Mg, O, Si

Other Names for Bridgmanite

Synonyms:
IMA2014-017Silicate-perovskite
Other Languages:

Other Information

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

References for Bridgmanite

Reference List:

- +
Murakami, M., Ohishi, Y., Hirao, N. & Hirose, K. (2012): A perovskitic lower mantle inferred from high-pressure, high-temperature sound velocity data. Nature 485(7396), 90–94. doi:10.1038/nature11004

Chi Ma and Oliver Tschauner (2014) Earth-building Bridgemanite, Caltech Press release, Katie Neith, http://www.caltech.edu/content/earth-building-bridgmanite. [Link Broken? Oct 2014]

Tschauner, O. and Ma, C. (2014)Bridgmanite, IMA 2014-017. CNMNC Newsletter No. 21, August 2014, page 798; Mineralogical Magazine, 78, 797-804.


Internet Links for Bridgmanite

Search Engines:
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  • External Links:
  • Look for Bridgmanite on Webmineral
  • Look for Bridgmanite on Athena Mineralogy
  • Look for Bridgmanite on Wikipedia
  • Look for Bridgmanite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Mineral Dealers:
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  • Localities for Bridgmanite

    The 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. ? 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.
    Australia
     
    • Queensland
      • Charters Towers Region
        • South Gregory
          • Tenham Station
    Tschauner, O. and Ma, C. (2014) Bridgmanite, IMA 2014-017. CNMNC Newsletter No. 21, August 2014, page 798; Mineralogical Magazine, 78, 797-804.
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