Althupite

Althupite (IMA symbol: Ahp^[1]) 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).^[2][3][4]

Althupite
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.
General
Category	Minerals
Formula	AlTh(UO2)7(PO4)4O2(OH)5·15H2O
IMA symbol	App
Identification
Color	Yellow
Tenacity	Flexible
Mohs scale hardness	3.5-4
Luster	Vitreous, Sub-Vitreous
Streak	Yellow
Diaphaneity	Transparent
Specific gravity	3.91
Other characteristics	Radioactive