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UM1994-08-O:CaFeKMgTi
Valid as an unnamed mineral
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Formula:
KTi5Fe3Cr2Mg2O19
Member of:
Chemically related to hawthorneite and reported as its Ti analogue. Co-described with UM1994-07-O:BaCrFeMgTi.
Both phases are reported as belonging to yimengite isomorphous series and being the Ti analogue of yimengite.
Both phases occur in Mg-bearing ilmenite of a kimberlitic origin. The ilmenite has spinel exsolution lamellae.
Compare UM1994-09-O:CrKTi.
Electron microprobe data, in wt.%, based on 4 analyses: SiO2 0.000-0.245, Al2O3 0.804-1.198, TiO2 38.181-45.442, FeO 20.710-24.900, Cr2O3 15.373-20.483, MgO 6.036-7.864, K2O 3.160-4.204, Na2O 0.329-0.648, CaO 0.053-0.411, BaO 0.000-1.251, ZrO2 0.145-0.561, SrO 0.055-0.377, MnO 0.001-0.457, V2O5 0.166-1.245, Nb2O5 0.024-0.582, La2O3 0.000-0.473, Ta2O5 0.000-0.975, total 98.047-100.455. Average wt.% composition leads to the empirical formula of (K0.741Na0.155Ca0.028Ba0.025Sr0.012La0.007)Σ0.943(Ti4.915Fe3.206Cr 2.137Mg1.506Al0.186V0.144Zr 0.029Nb0.022Ta0.019Mn0.016Sr)Σ12.058O19.
Note: the name reported by Smith & Nickel (2007) is wrong, as it should be UM1994-08-O:CrFeKMgTi.
Both phases are reported as belonging to yimengite isomorphous series and being the Ti analogue of yimengite.
Both phases occur in Mg-bearing ilmenite of a kimberlitic origin. The ilmenite has spinel exsolution lamellae.
Compare UM1994-09-O:CrKTi.
Electron microprobe data, in wt.%, based on 4 analyses: SiO2 0.000-0.245, Al2O3 0.804-1.198, TiO2 38.181-45.442, FeO 20.710-24.900, Cr2O3 15.373-20.483, MgO 6.036-7.864, K2O 3.160-4.204, Na2O 0.329-0.648, CaO 0.053-0.411, BaO 0.000-1.251, ZrO2 0.145-0.561, SrO 0.055-0.377, MnO 0.001-0.457, V2O5 0.166-1.245, Nb2O5 0.024-0.582, La2O3 0.000-0.473, Ta2O5 0.000-0.975, total 98.047-100.455. Average wt.% composition leads to the empirical formula of (K0.741Na0.155Ca0.028Ba0.025Sr0.012La0.007)Σ0.943(Ti4.915Fe3.206Cr 2.137Mg1.506Al0.186V0.144Zr 0.029Nb0.022Ta0.019Mn0.016Sr)Σ12.058O19.
Note: the name reported by Smith & Nickel (2007) is wrong, as it should be UM1994-08-O:CrFeKMgTi.
Unique Identifiers
Mindat ID:
53512
Long-form identifier:
mindat:1:1:53512:2
Similar Names
| UM1975-10-O:CaFeMgTi | ~Ca2Ti2(Fe,Mg)2O9 |
IMA Classification of UM1994-08-O:CaFeKMgTi
IMA status notes:
Unnamed (probably valid)
Chemistry of UM1994-08-O:CaFeKMgTi
Mindat Formula:
KTi5Fe3Cr2Mg2O19
Element Weights:
Relationship of UM1994-08-O:CaFeKMgTi to other Species
Member of:
Other Members of Magnetoplumbite Group:
| Chihuahuaite | FeAl12O19 | Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc |
| Hawthorneite Subgroup | ||
| Hibonite Subgroup | ||
| Magnetoplumbite Subgroup | ||
| Mizraite-(Ce) | Ce(Al11Mg)O19 | Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc |
| UM1994-07-O:BaCrFeMgTi | BaTi5Fe4Mg2CrO19 | |
| Yimengite | K(Cr,Ti,Fe,Mg)12O19 | Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc |
Radioactivity
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 UM1994-08-O:CaFeKMgTi
mindat.org URL:
https://www.mindat.org/min-53512.html
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References for UM1994-08-O:CaFeKMgTi
Reference List:
Localities for UM1994-08-O:CaFeKMgTi
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 | |
| Lu et al. (1994) +1 other reference |
