Global InformationAkimotoite information
| Akimotoite | |
|---|---|
| General | |
| Category | Oxide minerals Ilmenite group |
| Formula (repeating unit) | (Mg,Fe)SiO3 |
| IMA symbol | Aki[1] |
| Strunz classification | 4.CB.05[2] |
| Crystal system | Trigonal |
| Crystal class | Rhombohedral (3) H-M symbol: (3) |
| Space group | R3 |
| Unit cell | a = 4.7284, c = 13.5591 [Å]; Z = 6 |
| Identification | |
| Color | Colorless |
| Cleavage | perfect (0001) |
| Luster | vitreous |
| Streak | white or colorless |
| Diaphaneity | Transparent |
| Specific gravity | 3.81(calculated) |
| References | [2][3] |
Akimotoite is a rare silicate mineral in the ilmenite group of minerals, with the chemical formula (Mg,Fe)SiO3.[4] It is polymorphous with pyroxene and with bridgmanite, a natural silicate perovskite that is the most abundant mineral in Earth's silicate mantle.[2][5][6] Akimotoite has a vitreous luster, is colorless, and has a white or colorless streak. It crystallizes in the trigonal crystal system in space group R3. It is the silicon analogue of geikielite (MgTiO3).[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 "Akimotoite". Mindat.org.
- ^ "Akimotoite". Webmineral.
- ^ Tomioka; Fujino (1999). "Akimotoite, (Mg,Fe)SiO 3, a new silicate mineral of the ilmenite group in the Tenham chondrite".
- ^ Tomioka; Fujino (1997). "Natural (Mg,Fe)SiO3-Ilmenite and -Perovskite in the Tenham Meteorite". Science. 277 (5329): 1084–1086. doi:10.1126/science.277.5329.1084.
- ^ Tschauner, Oliver; et al. (2014). "Discovery of bridgmanite, the most abundant mineral in Earth, in a shocked meteorite". Science. 346 (6213): 1100–1102. doi:10.1126/science.1259369. PMID 25430766. S2CID 20999417.