Althupite
{{Short description|Aluminium thorium uranyl phosphate mineral}}
{{Infobox mineral
| name = Althupite
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| caption = Yellow crystals of the extremely rare Th-U mineral althupite from the type and only known locality worldwide in Kobokobo (Kobokobo Pegmatite, Mwenga, South Kivu, DR Congo). Vandenbroucke Museum collection from Waregem, Belgium.
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| formula = AlTh(UO2)7(PO4)4O2(OH)5·15H2O
| IMAsymbol = App
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| color = Yellow
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| tenacity = Flexible
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| mohs = 3.5-4
| luster = Vitreous, Sub-Vitreous
| streak = Yellow
| diaphaneity = Transparent
| gravity = 3.91
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| other = 25px Radioactive
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Althupite (IMA symbol: Ahp{{Cite journal|last=Warr|first=L.N.|date=2021|title=IMA-CNMNC approved mineral symbols|journal=Mineralogical Magazine|volume=85|issue=3|pages=291–320|doi=10.1180/mgm.2021.43|bibcode=2021MinM...85..291W|s2cid=235729616|doi-access=free}}) is a rare aluminium thorium uranyl phosphate mineral with complex formula written as AlTh(UO2)7(PO4)4O2(OH)5·15H2O, from a granitic pegmatite. It is named after its composition (ALuminium, THorium, Uranium, and Phosphorus).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, 65-72http://www.mindat.org/min-149.html Mindathttp://rruff.geo.arizona.edu/doclib/hom/althupite.pdf Handbook of Mineralogy