UM2001-09-O:CaNbREESiTiY
Valid as an unnamed mineral
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Formula:
(Ca,Y,REE)(Ti,Nb,Si)2(O,OH)6
Member of:
(Supposed) Ti analogue of vigezzite.
One of few 50–300-μm-sized grains of AB2O6-type oxides described.
Co-described with (then unknown) nioboaeschynite-(Y).
This vigezzite-like mineral has the following EPMA data [wt.%]:
CaO 5.29
FeO 0.69
Fe2O3 0.76 (assuming 50% partitioning)
UO2 3.49
ThO2 4.27
Y2O3 5.87
Ce2O3 2.31
Nd2O3 3.71
Gd2O3 1.09
Dy2O3 2.76
Ho2O3 0.78
Er2O3 1.20
Yb2O3 0.93
Nb2O5 28.25
Ta2O5 4.08
TiO2 19.60
WO3 0.92
SiO2 3.93
total 89.93
This corresponds to (Ca0.36Y0.20Th0.06U0.05Fe2+0.04REE0.28)Σ0.99(Ti0.94Nb0.81Si0.25Ta0.07Fe3+0.04W0.02)Σ2.13O6.
One of few 50–300-μm-sized grains of AB2O6-type oxides described.
Co-described with (then unknown) nioboaeschynite-(Y).
This vigezzite-like mineral has the following EPMA data [wt.%]:
CaO 5.29
FeO 0.69
Fe2O3 0.76 (assuming 50% partitioning)
UO2 3.49
ThO2 4.27
Y2O3 5.87
Ce2O3 2.31
Nd2O3 3.71
Gd2O3 1.09
Dy2O3 2.76
Ho2O3 0.78
Er2O3 1.20
Yb2O3 0.93
Nb2O5 28.25
Ta2O5 4.08
TiO2 19.60
WO3 0.92
SiO2 3.93
total 89.93
This corresponds to (Ca0.36Y0.20Th0.06U0.05Fe2+0.04REE0.28)Σ0.99(Ti0.94Nb0.81Si0.25Ta0.07Fe3+0.04W0.02)Σ2.13O6.
Unique Identifiers
Mindat ID:
54296
Long-form identifier:
mindat:1:1:54296:4
IMA Classification of UM2001-09-O:CaNbREESiTiY
IMA status notes:
Unnamed (probably valid)
Chemistry of UM2001-09-O:CaNbREESiTiY
Mindat Formula:
(Ca,Y,REE)(Ti,Nb,Si)2(O,OH)6
Element Weights:
Relationship of UM2001-09-O:CaNbREESiTiY to other Species
Member of:
Other Members of Aeschynite Group:
| Aeschynite-(Ce) | Ce(TiNb)O6 | Orth. mmm(2/m2/m2/m) : Pmna |
| Aeschynite-(Nd) | Nd(TiNb)O6 | Orth. mmm(2/m2/m2/m) |
| Aeschynite-(Y) | Y(TiNb)O6 | Orth. mmm(2/m2/m2/m) : Pmna |
| Rynersonite | CaTa2O6 | Orth. mmm(2/m2/m2/m) |
| Tantalaeschynite-(Ce) | Ce(TiTa)O6 | Orth. mmm(2/m2/m2/m) : Pnma |
| Tantalaeschynite-(Y) | Y(TiTa)O6 | Orth. mmm(2/m2/m2/m) |
| Vigezzite | CaNb2O6 | Orth. mmm(2/m2/m2/m) : Pnma |
| Yulinite | SrNb2O6 | Mon. 2/m : P21/b |
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 UM2001-09-O:CaNbREESiTiY
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https://www.mindat.org/min-54296.html
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References for UM2001-09-O:CaNbREESiTiY
Localities for UM2001-09-O:CaNbREESiTiY
Showing 1 localities.
ⓘ - 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.
- 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.
Italy | |
| Aurisicchio et al. (2001) +1 other reference |
