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Bridgmanite

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Percy Williams Bridgman
Formula:
(Mg,Fe)SiO3
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:
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

Approved 2014
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Type Occurrence of Bridgmanite

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 Data:
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)SiO3
Essential elements:
All elements listed in formula:

Other Names for Bridgmanite

Name in Other Languages:

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.

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.

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

Tschauner, O., Ma, C., Beckett, J.R., Prescher, C., Prakapenka, V.B., Rossman, G.R. (2014) Discovery of bridgmanite, the most abundant mineral in Earth, in a shocked meteorite. Science 346, 1110-1112. doi:10.1126/science.1259369

Internet Links for Bridgmanite

Localities for Bridgmanite

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.
Australia (TL)
 
  • 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.
Mineral and/or Locality  
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