Английская Википедия:Ichnusaite

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Шаблон:Infobox mineral Ichnusaite (pronounced iknusa-ait) is a very rarely found mineral.[1] Ichnusaite is a natural compound of thorium and molybdenum with the formula Th(MoO4)2·3H2O. It was discovered in Su Seinargiu, Sarroch, Cagliari, Sardegna, Italy in 2013.[2] The name is from the old Greek name of Sardinia, Ιχνουσσα, Ichnusa.[3]
This locality is also a place of discovery of the second natural thorium molybdate - nuragheite.[4]

Occurrence and association

Muscovite, nuragheite, and xenotime-(Y) are the associates of ichnusaite.[2]

Notes on chemistry

Ichnusaite is chemically pure.[2]

Crystal structure

The main features of the crystal structure of ichnusaite are:[2]

  • electroneutral Th(MoO4)2(H2O)2 (100) sheets
  • ThO7(H2O)2 and MoO4 polyhedra polymerize to give the above sheets
  • sheets are stacked along [100] and held by hydrogen bonds

Bibliography

References

Шаблон:Reflist


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