Nuragheite
# Nuragheite

Nuragheite is a rare natural thorium molybdate, formula $Th(MoO_4)_2·H_2O,$ discovered in Su Seinargiu, Sarroch, Cagliari, Sardegna, Italy. This locality is also a place of discovery of the other thorium molybdate - ichnusaite, which is a trihydrate.

## Occurrence and association

Nuragheite is a part of molybdenum-bismuth mineralization. It coexists with ichnusaite, muscovite, and xenotime-(Y).

## Notes on chemistry

Nuragheite is chemically pure.

## Crystal structure

The crystal structure of nuragheite is composed of (100) layers with $^{IX}Th-centered$ polyhedra and Mo-centered tetrahedra. It is thus similar to that of ichnusaite.

