Phuralumite
A valid IMA mineral species
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About Phuralumite
Formula:
Al2[(UO2)3(PO4)2O(OH)](OH)3(H2O)9
Colour:
Lemon yellow
Hardness:
3
Specific Gravity:
3.383 (Calculated)
Crystal System:
Monoclinic
Member of:
Name:
For the PHosphate, URanyl and ALUMinium ions in its composition.
Type Locality:
This page provides mineralogical data about Phuralumite.
Unique Identifiers
Mindat ID:
3201
Long-form identifier:
mindat:1:1:3201:4
GUID
(UUID V4):
(UUID V4):
661a7daf-34e6-4c86-9238-465aac505d7c
IMA Classification of Phuralumite
Approved
Approval year:
1978
First published:
1979
Classification of Phuralumite
8.EC.05
8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
C : UO2:RO4 = 3:2
8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
C : UO2:RO4 = 3:2
42.4.6.1
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
4 : (AB)5(XO4)2Zq·xH2O
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
4 : (AB)5(XO4)2Zq·xH2O
19.11.29
19 : Phosphates
11 : Phosphates of U
19 : Phosphates
11 : Phosphates of U
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 |
---|---|---|
Pha | 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 Phuralumite
Transparency:
Translucent
Colour:
Lemon yellow
Hardness:
3 on Mohs scale
Cleavage:
Perfect
On {010}
On {010}
Density:
3.383(10) g/cm3 (Calculated)
Optical Data of Phuralumite
Type:
Biaxial (-)
RI values:
nα = 1.559 nβ = 1.616 nγ = 1.624
2V:
Measured: 40° , Calculated: 38°
Max Birefringence:
δ = 0.065
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r < v moderate
Pleochroism:
Weak
Comments:
Colorless to very pale yellow on Y and Z
Comments:
X = b, Y near elongation
Chemistry of Phuralumite
Mindat Formula:
Al2[(UO2)3(PO4)2O(OH)](OH)3(H2O)9
Crystallography of Phuralumite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 9.4407(3) Å, b = 20.8596(8) Å, c = 13.4326(4) Å
β = 107.905(4)°
β = 107.905(4)°
Ratio:
a:b:c = 0.453 : 1 : 0.644
Unit Cell V:
2517.4 ų
Z:
4
Comment:
Space-group setting P21/n. Date from et al. (2017). Cell of type material was given as a = 13.87, b = 20.79 Å, c = 9.38, β = 112°.
Crystal Structure
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2x2x2 | 3x3x3 | 4x4x4
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2x2x2 | 3x3x3 | 4x4x4
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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) |
---|---|---|---|---|---|---|---|
0009687 | Phuralumite | Piret P, Piret-Meunier J, Declercq J P (1979) Structure of phuralumite Acta Crystallographica B35 1880-1882 | 1979 | Kobokobo, Kivu, Zaire | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
8.4 Å | (100) |
6.03 Å | (50) |
4.24 Å | (60) |
4.18 Å | (80) |
3.43 Å | (80) |
3.17 Å | (70) |
3.084 Å | (70) |
2.903 Å | (75) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 7: Great Oxidation Event | <2.4 |
47a : [Near-surface hydration of prior minerals] | |
47c : [Carbonates, phosphates, borates, nitrates] | |
47f : [Uranyl (U⁶⁺) minerals] |
Type Occurrence of Phuralumite
General Appearance of Type Material:
Lemon-yellow prismatic crystals, to 0.5 mm
Place of Conservation of Type Material:
Royal Museum of Central Africa, Tervuren, Belgium.
Geological Setting of Type Material:
beryl-columbite pegmatite
Associated Minerals at Type Locality:
Reference:
Deliens, M., Piret, P. (1979) Les phosphates d'uranyle et d'aluminium de Kobokobo. II. La phuralumite Al2(UO2)3(PO4)2(OH)6·10H2O et l'upalite Al (UO2)3 (PO4)2 (OH)3, nouveax minéraux. Bulletin de Minéralogie: 102: 333-337.
Synonyms of Phuralumite
Other Language Names for Phuralumite
Relationship of Phuralumite to other Species
Member of:
Other Members of this group:
Althupite | AlTh(UO2)7(PO4)4(OH)5O2 · 15H2O | Tric. 1 : P1 |
Bergenite | Ca2Ba4(UO2)9(PO4)6O6 · 16H2O | Mon. 2/m : P21/b |
Dewindtite | H2Pb3(UO2)6O4(PO4)4 · 12H2O | Orth. mmm (2/m 2/m 2/m) : Cmma |
Dumontite | Pb2(UO2)3O2(PO4)2 · 5H2O | Mon. 2/m : P21/m |
Françoisite-(Ce) | (Ce,Nd,Ca)(UO2)3(PO4)2O(OH) · 6H2O | Mon. 2/m : P21/b |
Françoisite-(Nd) | (Nd,Ce,Sm)(UO2)3(PO4)2O(OH) · 6H2O | Mon. 2/m |
Hügelite | Pb2(UO2)3(AsO4)2O2 · 5H2O | Mon. 2/m : P21/m |
Phosphuranylite | KCa(H3O)3(UO2)7(PO4)4O4 · 8H2O | Orth. mmm (2/m 2/m 2/m) : Cmcm |
Phurcalite | Ca2(UO2)3(PO4)2O2 · 7H2O | Orth. mmm (2/m 2/m 2/m) : Pbca |
Upalite | Al(UO2)3(PO4)2O(OH) · 7H2O | Mon. 2/m : P21/b |
Vanmeersscheite | U6+(UO2)3(PO4)2(OH)6 · 4H2O | Orth. mmm (2/m 2/m 2/m) |
Yingjiangite | K2Ca(UO2)7(PO4)4(OH)6 · 6H2O | Orth. mmm (2/m 2/m 2/m) : Cmcm |
Common Associates
Associated Minerals Based on Photo Data:
2 photos of Phuralumite associated with Microcline | K(AlSi3O8) |
2 photos of Phuralumite associated with Eylettersite | Th0.75Al3(PO4)2(OH)6 |
1 photo of Phuralumite associated with Quartz | SiO2 |
Related Minerals - Strunz-mindat Grouping
8.EC.05 | Françoisite-(Nd) | (Nd,Ce,Sm)(UO2)3(PO4)2O(OH) · 6H2O |
8.EC.05 | Upalite | Al(UO2)3(PO4)2O(OH) · 7H2O |
8.EC.05 | Françoisite-(Ce) | (Ce,Nd,Ca)(UO2)3(PO4)2O(OH) · 6H2O |
8.EC.10 | Arsenuranylite | Ca(UO2)4(AsO4)2(OH)4 · 6H2O |
8.EC.10 | Dewindtite | H2Pb3(UO2)6O4(PO4)4 · 12H2O |
8.EC.10 | Kivuite | Th(UO2)4(PO3OH)2(OH)8 · 7H2O |
8.EC.10 | Phosphuranylite | KCa(H3O)3(UO2)7(PO4)4O4 · 8H2O |
8.EC.10 | Yingjiangite | K2Ca(UO2)7(PO4)4(OH)6 · 6H2O |
8.EC.10 | Renardite | Pb(UO2)4(PO4)2(OH)4 · H2O |
8.EC.15 | Dumontite | Pb2(UO2)3O2(PO4)2 · 5H2O |
8.EC.15 | Hügelite | Pb2(UO2)3(AsO4)2O2 · 5H2O |
8.EC.20 | Metavanmeersscheite | U6+(UO2)3(PO4)2(OH)6 · 2H2O |
8.EC.20 | Vanmeersscheite | U6+(UO2)3(PO4)2(OH)6 · 4H2O |
8.EC.20 | Arsenovanmeersscheite | U6+(UO2)3(AsO4)2(OH)6 · 4H2O |
8.EC.25 | Althupite | AlTh(UO2)7(PO4)4(OH)5O2 · 15H2O |
8.EC.30 | Mundite | Al(UO2)3(PO4)2(OH)3 · 5.5H2O |
8.EC.35 | Phurcalite | Ca2(UO2)3(PO4)2O2 · 7H2O |
8.EC.40 | Bergenite | Ca2Ba4(UO2)9(PO4)6O6 · 16H2O |
Fluorescence of Phuralumite
Phuralumite is not fluorescent in UV, however, it is often associated with nearly identical looking minerals which are variously fluorescent in UV, usually in various shades of yellow to greenish yellow.
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 Phuralumite
mindat.org URL:
https://www.mindat.org/min-3201.html
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References for Phuralumite
Reference List:
Deliens, Michel, Piret, Paul (1979) Les phosphates d'uranyle et d'aluminium de Kobokobo. II. La phuralumite Al2(UO2)3(PO4)2(OH)6·10H2O et l'upalite Al(UO2)3(PO4)2(OH)3, nouveaux minéraux. Bulletin de Minéralogie, 102 (4) 333-337 doi:10.3406/bulmi.1979.7326
Deliens, Michel, Piret, Paul (1979) Les phosphates d'uranyle et d'aluminium de Kobokobo. II. La phuralumite Al2(UO2)3(PO4)2(OH)6·10H2O et l'upalite Al(UO2)3(PO4)2(OH)3, nouveaux minéraux. Bulletin de Minéralogie, 102 (4) 333-337 doi:10.3406/bulmi.1979.7326
Localities for Phuralumite
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.
DR Congo (TL) | |
| Deliens et al. (1979) |
Spain | |
| www.foro-minerales.com (n.d.) |
Switzerland | |
| Stalder et al. (1998) |
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Kobokobo pegmatite, Mwenga Territory, South Kivu, DR Congo