Yttrocrasite-(Y)
A material that is NOT an approved mineral species
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About Yttrocrasite-(Y)
Formula:
(Y,Th,Ca,U)(Ti,Fe)2(O,OH)6
Colour:
Black
Lustre:
Resinous
Hardness:
5½ - 6
Specific Gravity:
4.8
Crystal System:
Amorphous
Member of:
Name:
Named after its chemical composition containing yttrium and from Greek "krasis", "mixture", alluding to the many other elements present.
First Recorded Locality:
Euxenite Group.
A poorly characterised, often metamict mineral which may be identical with euxenite-(Y).
Compare also polycrase-(Y).
A poorly characterised, often metamict mineral which may be identical with euxenite-(Y).
Compare also polycrase-(Y).
Unique Identifiers
Mindat ID:
4370
Long-form identifier:
mindat:1:1:4370:6
GUID
(UUID V4):
(UUID V4):
c2b63d99-4b66-43a8-83dd-0d636b2975f9
IMA Classification of Yttrocrasite-(Y)
Questionable
First published:
1906
Classification of Yttrocrasite-(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
8.3.8.4
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
3 : AB2O6
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
3 : AB2O6
7.9.12
7 : Oxides and Hydroxides
9 : Oxides of Ti
7 : Oxides and Hydroxides
9 : Oxides of Ti
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 |
---|---|---|
Ycr-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 Yttrocrasite-(Y)
Resinous
Colour:
Black
Comment:
Under microscop fragments shows through their edges a amber to light yellow color
Hardness:
5½ - 6 on Mohs scale
Fracture:
Irregular/Uneven, Sub-Conchoidal
Density:
4.8 g/cm3 (Measured)
Optical Data of Yttrocrasite-(Y)
Chemistry of Yttrocrasite-(Y)
Mindat Formula:
(Y,Th,Ca,U)(Ti,Fe)2(O,OH)6
Common Impurities:
W
Crystallography of Yttrocrasite-(Y)
Crystal System:
Amorphous
Comment:
Metamict (may have been orthorhombic before metamictisation). Crook (1977) gives, for a non-metamict sample, the following unit-cell parameters and space group: Pbcn, a 12.862(7), b 4.810(2), c 4.571(3) Å.
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 |
First Recorded Occurrence of Yttrocrasite-(Y)
General Appearance of First Recorded Material:
A crystal with a dull brown alteration coating and a black, fresh interior.
Synonyms of Yttrocrasite-(Y)
Other Language Names for Yttrocrasite-(Y)
Relationship of Yttrocrasite-(Y) to other Species
Member of:
Other Members of this group:
Euxenite-(Y) | (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6 | Orth. mmm (2/m 2/m 2/m) : Pbcn |
Fersmite | (Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6 | Orth. mmm (2/m 2/m 2/m) : Pbcn |
Kobeite-(Y) | (Y,U)(Ti,Nb)2(O,OH)6 (?) | Iso. |
Loranskite-(Y) | (Y,Ce,Ca)ZrTaO6 (?) | |
Tanteuxenite-(Y) | Y(Ta,Nb,Ti)2(O,OH)6 | Orth. mmm (2/m 2/m 2/m) : Pbcn |
Uranopolycrase | (U4+,Y)(Ti,Nb)2O6 | Orth. mmm (2/m 2/m 2/m) : Pbcn |
Common Associates
Associated Minerals Based on Photo Data:
7 photos of Yttrocrasite-(Y) associated with Zircon | Zr(SiO4) |
7 photos of Yttrocrasite-(Y) associated with Monazite-(Ce) | Ce(PO4) |
7 photos of Yttrocrasite-(Y) associated with Thorogummite | (Th,U)(SiO4)1-x(OH)4x |
7 photos of Yttrocrasite-(Y) associated with Microcline | K(AlSi3O8) |
6 photos of Yttrocrasite-(Y) associated with Chloritoid | (Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2 |
5 photos of Yttrocrasite-(Y) associated with Thalénite-(Y) | Y3Si3O10F |
5 photos of Yttrocrasite-(Y) associated with Tengerite-(Y) | Y2(CO3)3 · 2-3H2O |
4 photos of Yttrocrasite-(Y) associated with Pyrophyllite | Al2Si4O10(OH)2 |
4 photos of Yttrocrasite-(Y) associated with Allanite-(Y) | (CaY)(AlAlFe2+)O[Si2O7][SiO4](OH) |
2 photos of Yttrocrasite-(Y) associated with Piemontite | (CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH) |
Related Minerals - Strunz-mindat Grouping
4.DG.05 | Euxenite-(Y) | (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6 |
4.DG.05 | Fersmite | (Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6 |
4.DG.05 | Kobeite-(Y) | (Y,U)(Ti,Nb)2(O,OH)6 (?) |
4.DG.05 | Loranskite-(Y) | (Y,Ce,Ca)ZrTaO6 (?) |
4.DG.05 | Tanteuxenite-(Y) | Y(Ta,Nb,Ti)2(O,OH)6 |
4.DG.05 | Uranopolycrase | (U4+,Y)(Ti,Nb)2O6 |
4.DG.10 | Clinofergusonite-(Y) | YNbO4 |
4.DG.10 | Clinofergusonite-(Nd) | (Nd,Ce)NbO4 |
4.DG.10 | Clinofergusonite-(Ce) | CeNbO4 |
4.DG.10 | Yttrotantalite-(Y) | (Y,U,Fe2+)(Ta,Nb)(O,OH)4 |
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 Yttrocrasite-(Y)
mindat.org URL:
https://www.mindat.org/min-4370.html
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References for Yttrocrasite-(Y)
Reference List:
Localities for Yttrocrasite-(Y)
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 | |
| Yunhuai Lin and Shiyang Chen (1985) |
Greece | |
| www.researchgate.net (n.d.) +5 other references |
Italy | |
| Ciriotti. M.E. et al. (2021) |
Ciriotti et al. (2021) | |
Russia | |
| Pavel.M. Kartashov (n.d.) |
Sweden | |
| Pavel.M. Kartashov (n.d.) |
USA | |
| Murdoch (1966) +1 other reference |
| Crook (1976) +1 other reference |
| Hidden and Warren (1906) |
| Crook (1976) |
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Grubependity Lake cirque, Grubependity Lake, Maldynyrd range, Kozhim River Basin, Komi Republic, Russia