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Loranskite-(Y)
A valid IMA mineral species - grandfathered
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About Loranskite-(Y)
Formula:
(Y,Ce,Ca)ZrTaO6 (?)
Colour:
Black; greenish yellow (transmitted light)
Lustre:
Sub-Metallic
Hardness:
5
Specific Gravity:
4.6
Member of:
Name:
Named in honor of Apolloniy Mikhailovich Loranskiy (Аполлоний Михайлович Лоранский) (1847-1917), Inspector of the Mining Institute, St. Petersburg, Russia.
Unique Identifiers
Mindat ID:
2435
Long-form identifier:
mindat:1:1:2435:4
IMA Classification of Loranskite-(Y)
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
(Y,Ce3+,Ca)(Zr4+,Ta5+)2O6
Classification of Loranskite-(Y)
4.DG.05
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
G : With large (+- medium-sized) cations; chains of edge-sharing octahedra
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
G : With large (+- medium-sized) cations; chains of edge-sharing octahedra
8.1.5.1
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
1 : ABO4
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
1 : ABO4
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Lrs-Y | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Loranskite-(Y)
Sub-Metallic
Colour:
Black; greenish yellow (transmitted light)
Streak:
Green-grey
Hardness:
5 on Mohs scale
Tenacity:
Brittle
Fracture:
Conchoidal
Density:
4.6 g/cm3 (Measured)
Optical Data of Loranskite-(Y)
Type:
Isotropic
RI values:
n = 2.06
Surface Relief:
Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Chemistry of Loranskite-(Y)
Mindat Formula:
(Y,Ce,Ca)ZrTaO6 (?)
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 26 : Hadean detrital minerals | |
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 34 : Complex granite pegmatites |
Type Occurrence of Loranskite-(Y)
General Appearance of Type Material:
Massive
Other Language Names for Loranskite-(Y)
Dutch:Loranskiet-(Y)
German:Loranskit-(Y)
Relationship of Loranskite-(Y) to other Species
Member of:
Other Members of Euxenite Group:
| Euxenite-(Y) | (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6 | Orth. mmm(2/m2/m2/m) : Pbcn |
| Fersmite | CaNb2O6 | Orth. mmm(2/m2/m2/m) : Pbcn |
| Kobeite-(Y) | (Y,U)(Ti,Nb)2(O,OH)6 (?) | Iso. |
| Tanteuxenite-(Y) | Y(Ta,Nb,Ti)2(O,OH)6 | Orth. mmm(2/m2/m2/m) : Pbcn |
| Uranopolycrase | (U4+,Y)(Ti,Nb)2O6 | Orth. mmm(2/m2/m2/m) : Pbcn |
| Yttrocrasite-(Y) | (Y,Th,Ca,U)(Ti,Fe)2(O,OH)6 | Amor. |
Related Minerals - Strunz-mindat Grouping
| 4.DG.05 | Fersmite | CaNb2O6 |
| 4.DG.05 | Uranopolycrase | (U4+,Y)(Ti,Nb)2O6 |
| 4.DG.05 | Yttrocrasite-(Y) | (Y,Th,Ca,U)(Ti,Fe)2(O,OH)6 |
| 4.DG.05 | Tanteuxenite-(Y) | Y(Ta,Nb,Ti)2(O,OH)6 |
| 4.DG.05 | Euxenite-(Y) | (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6 |
| 4.DG.05 | Kobeite-(Y) | (Y,U)(Ti,Nb)2(O,OH)6 (?) |
| 4.DG.10 | Yttrotantalite-(Y) | (Y,U,Fe2+)(Ta,Nb)(O,OH)4 |
| 4.DG.10 | Clinofergusonite-(Y) | YNbO4 |
| 4.DG.10 | Clinofergusonite-(Nd) | (Nd,Ce)NbO4 |
| 4.DG.10 | Clinofergusonite-(Ce) | CeNbO4 |
| 4.DG.15 | Foordite | Sn2+Nb2O6 |
| 4.DG.15 | Thoreaulite | Sn2+Ta2O6 |
| 4.DG.20 | Raspite | Pb(WO4) |
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 Loranskite-(Y)
mindat.org URL:
https://www.mindat.org/min-2435.html
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Please feel free to link to this page.
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References for Loranskite-(Y)
Reference List:
Localities for Loranskite-(Y)
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.
Russia (TL) | |
| Anthony et al. (1997) |
Impilakhti, Pitkyaranta mining district, Pitkyarantsky District, Republic of Karelia, Russia