Global InformationAllendeite information
| Allendeite | |
|---|---|
| General | |
| Category | Oxide minerals |
| Formula (repeating unit) | Sc4Zr3O12 |
| IMA symbol | Aed[1] |
| Dana classification | 4.6.8. Simple oxides |
| Crystal system | Trigonal |
| Crystal class | Rhombohedral (3) H–M Symbol: (3) |
| Space group | R3 |
| Unit cell | a = 9.396, c = 8.720 [Å] V = 666.7 Å3 |
| Identification | |
| Crystal habit | Microscopic crystals, inclusions |
| Specific gravity | 4.84 (calculated) |
| Refractive index | 2.14 (calculated) |
| References | [2][3][4] |
Allendeite, Sc4Zr3O12, is an oxide mineral.[2] Allendeite was discovered in a small ultrarefractory inclusion within the Allende meteorite.[2] This inclusion has been named ACM-1.[2] It is one of several scandium rich minerals that have been found in meteorites.[2] Allendeite is trigonal, with a calculated density of 4.84 g/cm3.[2] The new mineral was found along with hexamolybdenum.[2] These minerals, are believed to demonstrate conditions during the early stages of the Solar System, as is the case with many CV3 carbonaceous chondrites such as the Allende meteorite.[2] It is named after the Allende meteorite that fell in 1969 near Pueblito de Allende, Chihuahua, Mexico.[2]
- ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
- ^ a b c d e f g h i Beckett, John R. and Rossman, George R. = Allendeite (Sc4Zr3O12 and hexamolybdenum (Mo, Ru, Fe), two new minerals from an ultrarefractory inclusion from the Allende meteorite. American Mineralogist, Volume 99, pages 654-666, 2014. doi:10.2138/am.2014.4667
- ^ Allendeite data on Mindat.org
- ^ Allendeite data on Webmin