Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic Time
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral Quiz
Photo SearchPhoto GalleriesSearch by ColorNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Mineralogical ClassificationIMA 2014-089 = suseinargiuite

22nd Aug 2015 06:30 UTCMarco E. Ciriotti Manager

Reference:

▪ Orlandi, P., Biagioni, C., Moëlo, Y., Langlade, J., Faulques, E. (2015): Suseinargiuite, (Na0.5Bi0.5)MoO4, the Na-Bi analogue of wulfenite, from Su Seinargiu, Sardinia, Italy. [i]European Journal of Mineralogy[/i],[b] 27[/b], 695-699.


Abstract:

The new mineral species suseinargiuite, (Na0.5Bi0.5)MoO4, has been discovered in the Mo-Bi occurrence of Su Seinargiu, Sarroch, Cagliari, Sardinia, Italy. It occurs as hemispherical aggregates of very small acicular crystals, up to some micrometres in length. It is colourless, with a pearly to adamantine lustre. In the studied specimens, suseinargiuite is associated with wulfenite.Micro-Raman spectra were collected in the region between 100 and 2000 cm-1. The following bands have been observed (in cm-1): 131, 188, 319,∼376,∼772, and 876. Electron microprobe data collected on a chemically zoned grain gave (outer and inner zone, respectively – in wt%): MoO3 49.03, Bi2O3 42.97, PbO 2.89, Na2O 3.69, total 98.58, and MoO3 45.59, Bi2O3 34.47, PbO 12.04, Na2O 3.03, total 95.13. On the basis of 4 O atoms per formula unit, the relevant chemical formulae are (Na0.35Bi0.54Pb0.04)Σ=0.93Mo0.99O4 and (Na0.31Bi0.46Pb0.17)Σ=0.94Mo0.99O4, respectively. Main diffraction lines are [d in Å (relative intensity) hkl]: 3.146 (100) 112, 2.912 (13) 004, 2.652 (18) 200, 1.964 (34) 204, 1.875 (15) 220, 1.728 (19) 116, and 1.616 (28) 312 and 132. Unit-cell parameters, refined from the powder X-ray diffraction data in a tetragonal setting, space group [i]I[/i]41/[i]a[/i], are [i]a[/i] = 5.296(1), [i]c[/i] = 11.673(2)Å, [i]V[/i] = 327.4(1)Å3, [i]Z[/i] = 4. Owing to the lack of suitable crystals and the very small amount of available material, the crystal structure of suseinargiuite was not solved. However, X-ray powder diffraction data, micro-Raman spectra, as well as chemical analysis, show the close correspondence between suseinargiuite with synthetic (Na0.5Bi0.5)MoO4, which displays a scheelite-type structure.

15th Sep 2015 17:18 UTCKnut Edvard Larsen 🌟 Manager

Mineral page updated
 
Mineral and/or Locality  
Mindat Discussions Facebook Logo Instagram Logo Discord Logo
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2024, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: April 25, 2024 11:53:50
Go to top of page