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Althupite

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Formula:
AlTh(UO2)7(PO4)4(OH)5O2 · 15H2O
System:
Triclinic
Colour:
Yellow
Hardness:
3½ - 4
Name:
Named in 1987 by Paul Piret and Michel Deliens for its constituent elements: Al, Th, U and P.
This page provides mineralogical data about Althupite.

Classification of Althupite

Approved 1986
7/E.07-130
8.EC.25

8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
C : UO2:RO4 = 3:2
42.4.13.1

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
4 : (AB)5(XO4)2Zq·xH2O
19.11.33

19 : Phosphates
11 : Phosphates of U
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First Recorded Occurrence of Althupite

Place of Conservation of First Recorded Material:
Royal Museum of Central Africa, Tervuren, Belgium, RMG6178.
Year of Discovery:
1986
Geological Setting of First Recorded Material:
A secondary mineral in the uraniferous zone of an altered granite pegmatite.

Physical Properties of Althupite

Vitreous, Sub-Vitreous
Diaphaneity (Transparency):
Transparent
Colour:
Yellow
Streak:
Yellow
Hardness (Mohs):
3½ - 4
Tenacity:
Flexible
Density:
3.91 g/cm3 (Measured)    3.98 g/cm3 (Calculated)

Crystallography of Althupite

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Space Group Setting:
P1
Cell Parameters:
a = 10.953Å, b = 18.567Å, c = 13.504Å
α = 72.64°, β = 68.20°, γ = 84.21°
Ratio:
a:b:c = 0.59 : 1 : 0.727
Z:
2
Morphology:
As thin tabular crystals, flattened on {100} and terminated by {011} and {021}, to 0.1 mm, and in parallel groups.
X-Ray Powder Diffraction Data:
d-spacingIntensity
10.2 (100)
6.67 (40)
5.80 (50)
5.09 (70)
4.91 (40)
4.41 (50)
2.896 (50)

Optical Data of Althupite

Type:
Biaxial (-)
RI values:
nα = 1.620 nβ = 1.661 nγ = 1.665
2V:
Measured: 31° , Calculated: 34°
Birefringence:
0.045
Max Birefringence:
δ = 0.045
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r < v strong
Optical Extinction:
Z ^ c = 15°, X ~ a
Pleochroism:
Visible
Comments:
X = very pale yellow, Y = Z = yellow

Chemical Properties of Althupite

Formula:
AlTh(UO2)7(PO4)4(OH)5O2 · 15H2O
Essential elements:
All elements listed in formula:

Relationship of Althupite to other Species

8.EC.05Françoisite-(Nd)(Nd,Ce,Sm)(UO2)3(PO4)2O(OH) · 6H2O
8.EC.05PhuralumiteAl2(UO2)3(PO4)3(OH)2 · 13H2O
8.EC.05UpaliteAl(UO2)3(PO4)2O(OH) · 7H2O
8.EC.05Françoisite-(Ce)(Ce,Nd,Ca)(UO2)3(PO4)2O(OH) · 6H2O
8.EC.10ArsenuranyliteCa(UO2)4(AsO4)2(OH)4 · 6H2O
8.EC.10DewindtiteH2Pb3(UO2)2(PO4)4O4 · 12H2O
8.EC.10Kivuite(Th,Ca,Pb)(UO2)4(HPO4)2(OH)8 · 7H2O
8.EC.10Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
8.EC.10YingjiangiteK2Ca(UO2)7(PO4)4(OH)6 · 6H2O
8.EC.15DumontitePb2(UO2)3(PO4)2(OH)4 · 3H2O
8.EC.15HügelitePb2(UO2)3(AsO4)2O2 · 5H2O
8.EC.20MetavanmeersscheiteU6+(UO2)3(PO4)2(OH)6 · 2H2O
8.EC.20VanmeersscheiteU6+(UO2)3(PO4)2(OH)6 · 4H2O
8.EC.20ArsenovanmeersscheiteU4+(UO2)3(AsO4)2(OH)2 · 4H2O
8.EC.30MunditeAl(UO2)3(PO4)2(OH)3 · 5.5H2O
8.EC.35PhurcaliteCa2(UO2)3(PO4)2O2 · 7H2O
8.EC.40BergeniteCa2Ba4(UO2)9(PO4)6O6 · 16H2O
19.11.1LermontoviteU(PO4)(OH) · H2O
19.11.2MetavanmeersscheiteU6+(UO2)3(PO4)2(OH)6 · 2H2O
19.11.3VanmeersscheiteU6+(UO2)3(PO4)2(OH)6 · 4H2O
19.11.4Chernikovite(H3O)2(UO2)2(PO4)2 · 6H2O
19.11.5VyacheslaviteU(PO4)(OH) · nH2O
19.11.6MetanatroautuniteNa(UO2)(PO4)(H2O)3
19.11.7YingjiangiteK2Ca(UO2)7(PO4)4(OH)6 · 6H2O
19.11.8Meta-ankoleiteK2(UO2)2(PO4)2 · 6H2O
19.11.9Uramphite(NH4)2(UO2)2(PO4)2 · 6H2O
19.11.10TorberniteCu(UO2)2(PO4)2 · 12H2O
19.11.11MetatorberniteCu(UO2)2(PO4)2 · 8H2O
19.11.12SaléeiteMg(UO2)2(PO4)2 · 10H2O
19.11.13NingyoiteCaU(PO4)2 · 1-2H2O
19.11.14Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
19.11.15AutuniteCa(UO2)2(PO4)2 · 11H2O
19.11.16Pseudo-autunite(H3O)4Ca2(UO2)2(PO4)4 · 5H2O
19.11.17PhurcaliteCa2(UO2)3(PO4)2O2 · 7H2O
19.11.18Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
19.11.19UlrichiteCaCu(UO2)(PO4)2 · 4H2O
19.11.20BergeniteCa2Ba4(UO2)9(PO4)6O6 · 16H2O
19.11.21Metauranocircite-IBa(UO2)2(PO4)2 · 7H2O
19.11.22UranocirciteBa(UO2)2(PO4)2 · 10H2O
19.11.23RanunculiteHAl(UO2)(PO4)(OH)3 · 4H2O
19.11.24TrianguliteAl3(UO2)4(PO4)4(OH)5 · 5H2O
19.11.25MunditeAl(UO2)3(PO4)2(OH)3 · 5.5H2O
19.11.26UpaliteAl(UO2)3(PO4)2O(OH) · 7H2O
19.11.27FurongiteAl13(UO2)7(PO4)13(OH)14 · 58H2O
19.11.28ThreadgolditeAl(UO2)2(PO4)2(OH) · 8H2O
19.11.29PhuralumiteAl2(UO2)3(PO4)3(OH)2 · 13H2O
19.11.30MoreauiteAl3(UO2)(PO4)3(OH)2 · 13H2O
19.11.31SabugaliteHAl(UO2)4(PO4)4 · 16H2O
19.11.32Uranospathite(Al,☐)(UO2)2(PO4)2F · 20(H2O,F)
19.11.34Françoisite-(Nd)(Nd,Ce,Sm)(UO2)3(PO4)2O(OH) · 6H2O
19.11.35Kivuite(Th,Ca,Pb)(UO2)4(HPO4)2(OH)8 · 7H2O
19.11.36ParsonsitePb2(UO2)(PO4)2 · 2H2O
19.11.37DewindtiteH2Pb3(UO2)2(PO4)4O4 · 12H2O
19.11.38DumontitePb2(UO2)3(PO4)2(OH)4 · 3H2O
19.11.39PrzhevalskitePb2(UO2)3(PO4)2(OH)4 · 3H2O
19.11.40LehneriteMn2+(UO2)2(PO4)2 · 8H2O
19.11.41BassetiteFe2+(UO2)2(PO4)2 · 8H2O
19.11.42Vochtenite(Fe2+,Mg)Fe3+(UO2)4(PO4)4(OH) · 12-13H2O

Other Names for Althupite

Name in Other Languages:
German:Althupit
Spanish:Althupita

Other Information

Apparently not fluorescent
Other Information:
radioactive
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Althupite

Reference List:
Piret, P. and Deliens, M. (1987) Les phosphates d'uranyle et d'aluminium de Kobokobo. IX. L'althupite AlTh(UO2)[(UO2)3O(OH)(PO4)2]2 OH)3·15H2O, nouveau minéral; propriétés et structure cristalline. Bulletin de Mineralogie: 110: 65-72.

American Mineralogist (1988): 73: 189-190.

Bulletin de Mineralogie: 110: 65-72.

Burns, P.C. (2005) U 6+ minerals and inorganic compounds: insights into an expanded structural hierarchy of crystal structures. Canadian Mineralogist: 43: 1839-1894.

Internet Links for Althupite

Localities for Althupite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Democratic Republic of Congo (Zaïre)
 
  • Sud-Kivu
    • Mwenga
Bull.Mineral.(1987) 110, 65-72
Mineral and/or Locality  
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