Davemaoite
A valid IMA mineral species
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Ho-Kwang (Dave) Mao
Formula:
CaSiO3
Crystal System:
Isometric
Name:
Named in honor of Ho-Kwang (Dave) Mao (毛河光) (b. 18 June 1941, Shanghai, China), Chinese-American geologist at the Geophysical Laboratory of the Carnegie Institution for Science. He is an expert on high pressure mineralogy and with Peter M. Bell achieved the first verified static pressure in excess of 1 Megabar in the lab. Among many prizes, he was awarded the 2005 Roebling Medal (Mineralogical Society of America) and the 2007 Inge Lehmann Medal (American Geophysical Union). The species maohokite is also named after him.
Polymorph of:
High-pressure polymorph with a perovskite-type structure.
Unique Identifiers
Mindat ID:
55255
Long-form identifier:
mindat:1:1:55255:4
IMA Classification of Davemaoite
Approved
Approval year:
2020
Classification of Davemaoite
9.H0.
9 : SILICATES (Germanates)
H : Unclassified silicates
0 :
9 : SILICATES (Germanates)
H : Unclassified silicates
0 :
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Dvm | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Chemistry of Davemaoite
Mindat Formula:
CaSiO3
Element Weights:
Elements listed:
Crystallography of Davemaoite
Crystal System:
Isometric
Class (H-M):
m3m(4/m32/m) - Hexoctahedral
Space Group:
Pm3m
Setting:
Pm3m
Cell Parameters:
a = 3.591(2) Å
Unit Cell V:
46.31 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.539 Å | (100) |
| 2.073 Å | (50) |
| 1.795 Å | (84) |
| 1.466 Å | (43) |
| 1.270 Å | (48) |
| 1.136 Å | (19) |
| 1.037 Å | (15) |
| 0.960 Å | (22) |
Comments:
From Type Description.
Type Occurrence of Davemaoite
General Appearance of Type Material:
As inclusions in a diamond.
Place of Conservation of Type Material:
Type material is deposited in the mineralogical collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue number 74541.
Associated Minerals at Type Locality:
Synonyms of Davemaoite
Other Language Names for Davemaoite
Dutch:Davemaoiet
German:Davemaoit
Relationship of Davemaoite to other Species
Other Members of Bridgmanite Subgroup:
| Bridgmanite | MgSiO3 | Orth. mmm(2/m2/m2/m) : Pnma |
Related Minerals - Strunz-mindat Grouping
| 9.H0. | Aklimaite | Ca4[Si2O5(OH)2](OH)4 · 5H2O |
| 9.H0. | Bridgmanite | MgSiO3 |
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.
Internet Links for Davemaoite
mindat.org URL:
https://www.mindat.org/min-55255.html
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References for Davemaoite
Reference List:
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2020) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 58. European Journal of Mineralogy, 32 (6) 645-651 doi:10.5194/ejm-32-645-2020
Tschauner, Oliver, Huang, Shichun, Yang, Shuying, Humayun, Munir, Liu, Wenjun, Gilbert Corder, Stephanie N, Bechtel, Hans A., Tischler, Jon, Rossman, George R. (2021) Discovery of davemaoite, CaSiO3-perovskite, as a mineral from the lower mantle. Science, 374 (6569). 891-894 doi:10.1126/science.abl8568
Localities for Davemaoite
Showing 2 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Botswana (TL) | |
| Tschauner +10 other references |
Brazil | |
| Kaminsky et al. (2023) |
