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
GUID
(UUID V4):
(UUID V4):
9abbe129-8a14-4648-9e79-93fcc9405a96
Classification of UM1994-07-O:BaCrFeMgTi
IMA status notes:
Unnamed (probably valid)
Chemical Properties of UM1994-07-O:BaCrFeMgTi
Formula:
BaTi5Fe4Mg2CrO19
the original authors report it as Ba(Cr4Fe4Ti3Mg)Σ12O19
the original authors report it as Ba(Cr4Fe4Ti3Mg)Σ12O19
Relationship of UM1994-07-O:BaCrFeMgTi to other Species
Member of:
Other Members of this 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 |
UM1994-08-O:CaFeKMgTi | KTi5Fe3Cr2Mg2O19 | |
Yimengite | K(Cr,Ti,Fe,Mg)12O19 | Hex. 6/mmm (6/m 2/m 2/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.
References for UM1994-07-O:BaCrFeMgTi
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Lu, Q., Chou, H. (1994): Newly discovered members of the yimengite isomorphous series: K(Ti5Fe3Ca2Mg2)12O19 and Ba(Ti5Fe4Mg2Cr)12O19. Acta Mineral. Sinica: 14(3): 228-233 (in Chinese, English abs.); in: Jambor, J.L., Pertsev, N.P., Roberts, A.C (1996): New mineral Names. American Mineralogist: 81: 769
Smith, D.G.W., Nickel, E.H. (2007): A System of Codification for Unnamed Minerals: Report of the SubCommittee for Unnamed Minerals of the IMA Commission on New Minerals, Nomenclature and Classification. Canadian Mineralogist: 45: 983-1055; http://nrmima.nrm.se
Internet Links for UM1994-07-O:BaCrFeMgTi
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https://www.mindat.org/min-53511.html
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Localities for UM1994-07-O:BaCrFeMgTi
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).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
China | |
| Lu, Q., Chou, H. (1994): Newly discovered members of the yimengite isomorphous series: K(Ti5Fe3Ca2Mg2)12O19 and Ba(Ti5Fe4Mg2Cr)12O19. Acta Mineral. Sinica: 14(3): 228-233 (in Chinese, English abs.); in: Jambor, J.L., Pertsev, N.P., Roberts, A.C (1996): New mineral Names. American Mineralogist: 81: 769 |