Elgoresyite
A valid IMA mineral species
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Ahmed El Goresy
Formula:
(Mg5Si2)O9
Specific Gravity:
4.315 (Calculated)
Crystal System:
Monoclinic
Name:
After Ahmed El Goresy (1935- October 3, 2019 Heidelberg), a highly regarded mineralogist working on planetary materials.
Elgoresyite exhibits the same crystal structure as the high-pressure iron oxide Fe7O9 stable at 24–26 GPa and 1873–1973 K.
Three sites are octahedrally coordinated and connected in a 3D network (M1, M2, and M3), while the fourth, M4, has a trigonal-prismatic geometry with an additional long bond with O2
Color, luster, streak, hardness, tenacity, cleavage, fracture, and density could not be determined because of the small grain size, and optical properties could also not be determined because of the small grain size.
Three sites are octahedrally coordinated and connected in a 3D network (M1, M2, and M3), while the fourth, M4, has a trigonal-prismatic geometry with an additional long bond with O2
Color, luster, streak, hardness, tenacity, cleavage, fracture, and density could not be determined because of the small grain size, and optical properties could also not be determined because of the small grain size.
Unique Identifiers
Mindat ID:
55377
Long-form identifier:
mindat:1:1:55377:5
GUID
(UUID V4):
(UUID V4):
e900ef64-3f16-40e7-a811-b1e4a7b17dcb
IMA Classification of Elgoresyite
Classification of Elgoresyite
4.BB.
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
B : Metal: Oxygen = 3:4 and similar
B : With only medium-sized cations
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
B : Metal: Oxygen = 3:4 and similar
B : With only medium-sized cations
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 |
|---|---|---|
| Ego | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Elgoresyite
Density:
4.315 g/cm3 (Calculated)
Chemistry of Elgoresyite
Mindat Formula:
(Mg5Si2)O9
Elements listed:
Crystallography of Elgoresyite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 9.397(2) Å, b = 2.763(1) Å, c = 11.088(3) Å
β = 94.25(2)°
β = 94.25(2)°
Ratio:
a:b:c = 3.401 : 1 : 4.013
Unit Cell V:
287.10 ų (Calculated from Unit Cell)
Type Occurrence of Elgoresyite
General Appearance of Type Material:
Unique grain in a shock-induced melt vein of the Suizhou meteorite. Suizhou L6 chondrite is a shocked meteorite with the occurrence of thin shock-induced melt veins less than 300 μm in thickness.
Place of Conservation of Type Material:
Mineralogical collections of the Museo di Storia Naturale, Università di Firenze, Via La Pira 4, I-50121, Firenze, Italy, catalogue number 3238/I.
Geological Setting of Type Material:
Shocked meteorite.
Associated Minerals at Type Locality:
Synonyms of Elgoresyite
Related Minerals - Strunz-mindat Grouping
| 4.BB. | Chenmingite | FeCr2O4 |
| 4.BB. | Dellagiustaite | V2+Al2O4 |
| 4.BB. | Thermaerogenite | CuAl2O4 |
| 4.BB. | Chukochenite | LiAl5O8 |
| 4.BB. | Garpenbergite | Mn6◻AsSbO10(OH)2 |
| 4.BB. | Magnéliite | Ti3+2Ti4+2O7 |
| 4.BB. | Jianmuite | ZrTi4+Ti3+5Al3O16 |
| 4.BB.05 | Chromite | Fe2+Cr3+2O4 |
| 4.BB.05 | Cochromite | CoCr2O4 |
| 4.BB.05 | Coulsonite | Fe2+V3+2O4 |
| 4.BB.05 | Cuprospinel | Cu2+Fe3+2O4 |
| 4.BB.05 | Filipstadite | (Fe3+0.5Sb5+0.5)Mn2O4 |
| 4.BB.05 | Franklinite | Zn2+Fe3+2O4 |
| 4.BB.05 | Gahnite | ZnAl2O4 |
| 4.BB.05 | Galaxite | Mn2+Al2O4 |
| 4.BB.05 | Hercynite | Fe2+Al2O4 |
| 4.BB.05 | Jacobsite | Mn2+Fe3+2O4 |
| 4.BB.05 | Manganochromite | Mn2+Cr2O4 |
| 4.BB.05 | Magnesiocoulsonite | MgV2O4 |
| 4.BB.05 | Magnesiochromite | MgCr2O4 |
| 4.BB.05 | Magnesioferrite | MgFe3+2O4 |
| 4.BB.05 | Magnetite | Fe2+Fe3+2O4 |
| 4.BB.05 | Nichromite | (Ni,Co,Fe)(Cr,Fe,Al)2O4 |
| 4.BB.05 | Qandilite | (Mg,Fe3+)2(Ti,Fe3+,Al)O4 |
| 4.BB.05 | Spinel | MgAl2O4 |
| 4.BB.05 | Trevorite | Ni2+Fe3+2O4 |
| 4.BB.05 | Ulvöspinel | TiFe2+2O4 |
| 4.BB.05 | Vuorelainenite | Mn2+V3+2O4 |
| 4.BB.05 | Zincochromite | ZnCr2O4 |
| 4.BB.05 | Harmunite | CaFe2O4 |
| 4.BB.05 | Wernerkrauseite | Ca(Fe3+,Mn3+)2Mn4+O6 |
| 4.BB.05 | Deltalumite | (Al0.67◻0.33)Al2O4 |
| 4.BB.05 | Guite | Co2+Co3+2O4 |
| 4.BB.10 | Hausmannite | Mn2+Mn3+2O4 |
| 4.BB.10 | Hetaerolite | ZnMn2O4 |
| 4.BB.10 | Manganostibite | (Mn,Fe)7SbAsO12 |
| 4.BB.15 | Maghemite | (Fe3+0.67◻0.33)Fe3+2O4 |
| 4.BB.15 | Titanomaghemite | (Ti4+0.5◻0.5)Fe3+2O4 |
| 4.BB.20 | Tegengrenite | (Mn3+0.5Sb5+0.5)Mg2O4 |
| 4.BB.25 | Xieite | Fe2+Cr2O4 |
| 4.BB.30 | Carmeltazite | ZrAl2Ti4O11 |
| 4.BB.35 | Feiite | Fe2+2(Fe2+Ti4+)O5 |
| 4.BB.40 | Maohokite | MgFe2O4 |
| 4.BB.45 | Tschaunerite | (Fe2+)(Fe2+Ti4+)O4 |
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 Elgoresyite
mindat.org URL:
https://www.mindat.org/min-55377.html
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References for Elgoresyite
Localities for Elgoresyite
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.
China (TL) | |
| Mineralogical Magazine: 85 +1 other reference |
