Uranopolycrase
A valid IMA mineral species
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About Uranopolycrase
Formula:
(U4+,Y)(Ti,Nb)2O6
Colour:
Brown-red
Lustre:
Adamantine
Hardness:
5 - 6
Crystal System:
Orthorhombic
Member of:
Name:
Named as the uranium-dominant analogue of polycrase-(Y).
The uranium analogue of polycrase-(Y).
Compare also brannerite.
Type material almost totally metamict.
Compare also brannerite.
Type material almost totally metamict.
Unique Identifiers
Mindat ID:
4109
Long-form identifier:
mindat:1:1:4109:2
GUID
(UUID V4):
(UUID V4):
8a192eb5-e7cb-4334-b866-f6dec57a20c1
IMA Classification of Uranopolycrase
Classification of Uranopolycrase
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
8.3.8.5
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
3 : AB2O6
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
3 : AB2O6
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 |
|---|---|---|
| Uplc | 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 Uranopolycrase
Adamantine
Transparency:
Opaque
Colour:
Brown-red
Hardness:
5 - 6 on Mohs scale
Hardness:
VHN20=659 kg/mm2 - Vickers
Cleavage:
Distinct/Good
{100}
{100}
Optical Data of Uranopolycrase
Bireflectance:
None observed
Reflectivity:
| Wavelength | R |
|---|---|
| 470nm | 23.6% |
| 546nm | 21.5% |
| 589nm | 22.3% |
| 650nm | 25.1% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 25.1%.
Colour in reflected light:
Pale grey with bluish tones.
Internal Reflections:
Weak, dark-brown red on the rims of crystal fragments only.
Pleochroism:
Not Visible
Chemistry of Uranopolycrase
Mindat Formula:
(U4+,Y)(Ti,Nb)2O6
Common Impurities:
Th,Mn,Ca,Nd,TR
Crystallography of Uranopolycrase
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pbcn
Cell Parameters:
a = 14.51(1) Å, b = 5.558(5) Å, c = 5.173(4) Å
Ratio:
a:b:c = 2.611 : 1 : 0.931
Unit Cell V:
417.18 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Tabular on {100} and elongated parallel to [001].
Observed forms include {100}, {010}, {011}.
Observed forms include {100}, {010}, {011}.
Comment:
Crystalline only after heating at 900°C for 10 h; originally metamict.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
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Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
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CIF File Best | x | y | z | a | b | c
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0006507 | Uranopolycrase | Aurisicchio C, Orlandi P, Pasero M, Perchiazzi N (1993) Uranopolycrase, the uranium-dominant analogue of polycrase-(Y), a new mineral from Elba Island, Italy, and its crystal structure European Journal of Mineralogy 5 1161-1165 | 1993 | Elba Island, Italy | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.99 Å | (100) |
| 2.78 Å | (25) |
| 1.90 Å | (50) |
| 1.77 Å | (35) |
| 1.48 Å | (40) |
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 Uranopolycrase
General Appearance of Type Material:
Crystals, tabular on {100} crystals and elongated in the [001] direction.
Place of Conservation of Type Material:
University of Pisa, Pisa, Italy.
Geological Setting of Type Material:
Pegmatite with abundant Nb- Ta minerals and zeolites. Found in the cavities of the fine-grained intermediate zone. As inclusions within beryl.
Associated Minerals at Type Locality:
Synonyms of Uranopolycrase
Other Language Names for Uranopolycrase
German:Uranopolykras
Russian:Уранополикраз
Relationship of Uranopolycrase 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 |
| Yttrocrasite-(Y) | (Y,Th,Ca,U)(Ti,Fe)2(O,OH)6 | Amor. |
Common Associates
Associated Minerals Based on Photo Data:
| 6 photos of Uranopolycrase associated with Quartz | SiO2 |
| 2 photos of Uranopolycrase associated with Fluorite | CaF2 |
| 1 photo of Uranopolycrase associated with Foitite | ◻(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3(OH) |
| 1 photo of Uranopolycrase associated with Hematite | Fe2O3 |
| 1 photo of Uranopolycrase associated with Magnetite | Fe2+Fe3+2O4 |
| 1 photo of Uranopolycrase associated with Pyrite | FeS2 |
| 1 photo of Uranopolycrase associated with Albite | Na(AlSi3O8) |
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 | Yttrocrasite-(Y) | (Y,Th,Ca,U)(Ti,Fe)2(O,OH)6 |
| 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 Uranopolycrase
mindat.org URL:
https://www.mindat.org/min-4109.html
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Please feel free to link to this page.
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References for Uranopolycrase
Reference List:
Localities for Uranopolycrase
symbol to view information about a locality.
The 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).
All localities listed without proper references should be considered as questionable.
Egypt | |
| Helmy |
Italy | |
| Ghizzoni et al. (2005) |
| Bruno Marello collection +1 other reference |
| Ciriotti et al. (2021) | |
| Callegari A. (2002) +2 other references |
| Giannettoni L. et al. (1993) |
| Adriano Perugini found | |
| Orlandi et al. (1997) | |
| Orlandi et al. (1997) | |
Mexico | |
| Prol-Ledesma et al. (2012) |
Norway | |
| Kristiansen (2022) |
Slovakia | |
| Uher P. et al. (2009) |
| Uher P. et al. (2009) | |
Switzerland | |
| F. Bedogne |
| Stalder et al. (1998) |
| Cuchet et al. (2019) |
Tajikistan | |
| Leonid Pautov and Mirak Mirakov ... |
| Pautov et al. (2018) |
USA | |
| Rudy Bologna |
| Self-Collected by Franklin Roberts |
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San Piero in Campo, Campo nell'Elba, Livorno Province, Tuscany, Italy