UM1994-07-O:BaCrFeMgTi
Valid as an unnamed mineral
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Formula:
BaTi5Fe4Mg2CrO19
the original authors report it as Ba(Cr4Fe4Ti3Mg)Σ12O19
Member of:
Chemically related to hawthorneite and reported as its Ti analogue (more specifically: it is its Ti5Mg2Cr analogue). Co-described with UM1994-08-O:CaFeKMgTi.
Both phases are reported as belonging to yimengite isomorphous series.
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 0.000-0.348, Al2O3 0.391-0.941, TiO2 36.644-41.529, FeO 28.025-30.753, Cr2O3 7.982-12.883, MgO 5.431-6.706, K2O 1.804-2.524, Na2O 0.110-0.434, CaO 0.200-1.027, BaO 6.613-7.006, ZrO2 0.217-0.537, SrO 0.211-0.539, MnO 0.118-0.260, V2O5 0.925-1.104, Nb2O5 0.000-0.447, La2O3 0.038-0.476, Ta2O5 0.000-1.298, total 97.364-100.200 wt%. Average wt.% composition leads to the empirical formula of (Ba0.506K0.415Ca0.109Na0.106La0.019Sr0.018)Σ1.235(Ti4.928Fe4.050Mg 1.442Cr1.291Al0.106V0.129Zr 0.049Mn0.026Nb0.016Ta0.013)Σ12.050O19.
Both phases are reported as belonging to yimengite isomorphous series.
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 0.000-0.348, Al2O3 0.391-0.941, TiO2 36.644-41.529, FeO 28.025-30.753, Cr2O3 7.982-12.883, MgO 5.431-6.706, K2O 1.804-2.524, Na2O 0.110-0.434, CaO 0.200-1.027, BaO 6.613-7.006, ZrO2 0.217-0.537, SrO 0.211-0.539, MnO 0.118-0.260, V2O5 0.925-1.104, Nb2O5 0.000-0.447, La2O3 0.038-0.476, Ta2O5 0.000-1.298, total 97.364-100.200 wt%. Average wt.% composition leads to the empirical formula of (Ba0.506K0.415Ca0.109Na0.106La0.019Sr0.018)Σ1.235(Ti4.928Fe4.050Mg 1.442Cr1.291Al0.106V0.129Zr 0.049Mn0.026Nb0.016Ta0.013)Σ12.050O19.
Unique Identifiers
Mindat ID:
53511
Long-form identifier:
mindat:1:1:53511:3
Similar Names
| UM1975-09-O:BaCrFeMgTiV | (Fe,Mg,Ba,Ca)3Cr3VTi7O23 or (Ba,Ca)(Fe5Mg3)(Cr7V4Ti20)O66 ? |
IMA Classification of UM1994-07-O:BaCrFeMgTi
IMA status notes:
Unnamed (probably valid)
Chemistry of UM1994-07-O:BaCrFeMgTi
Mindat Formula:
BaTi5Fe4Mg2CrO19
the original authors report it as Ba(Cr4Fe4Ti3Mg)Σ12O19
the original authors report it as Ba(Cr4Fe4Ti3Mg)Σ12O19
Element Weights:
Relationship of UM1994-07-O:BaCrFeMgTi to other Species
Member of:
Other Members of Magnetoplumbite Group:
| Chihuahuaite | FeAl12O19 | Hex. 6/mmm(6/m2/m2/m) : P63/mmc |
| Hawthorneite Subgroup | ||
| Hibonite Subgroup | ||
| Magnetoplumbite Subgroup | ||
| Mizraite-(Ce) | Ce(Al11Mg)O19 | Hex. 6/mmm(6/m2/m2/m) : P63/mmc |
| 'UM1994-08-O:CaFeKMgTi' | KTi5Fe3Cr2Mg2O19 | |
| Yimengite | K(Cr,Ti,Fe,Mg)12O19 | Hex. 6/mmm(6/m2/m2/m) : P63/mmc |
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 UM1994-07-O:BaCrFeMgTi
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https://www.mindat.org/min-53511.html
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References for UM1994-07-O:BaCrFeMgTi
Reference List:
Localities for UM1994-07-O:BaCrFeMgTi
Showing 1 localities.
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The Locality List
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- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
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All localities listed without proper references should be considered as questionable.
China | |
| Lu et al. (1994) +1 other reference |
