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
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral QuizTime Machine
Photo SearchPhoto GalleriesSearch by ColorNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography
Chovanite
A valid IMA mineral species
This page is currently not sponsored.Click here to sponsor this page.
![Pb15-2xSb14+2xS36Ox (x ~ 0.2)](#"/photo-907008.html"><img src="/image.pl?url=https%3a%2f%2fwww.mindat.org%2fimagecache%2f9c%2ff2%2f08475570017272471905907.jpg&f=jpg&w=240" alt="08475570017272471905907.jpg" /></a><div><b>Martin Chovan</b></div></div></div><div><div><span>Formula:</span><div class=){kind=link}
May contain minor Tl; the Monte Arsiccio material has a formula close to TlPb26(Sb,As)31S72O, while the Pollone's one is close to Pb28(Sb,As)30S72O
Colour:
Grey, black
Lustre:
Metallic
Hardness:
3
Specific Gravity:
6.029 (Calculated)
Crystal System:
Monoclinic
Name:
Named after Prof. Martin Chovan (b. 1946) outstanding Slovak mineralogist, Department of Mineralogy and Petrology, Comenius University, Bratislava, Slovakia. He has performed extensive studies of antimony mineralization in the Western Carpathians. Pronunciation of the name is ‘‘khovanite’.
The single oxygen atom in the structure is bound to two (Sb,As) atoms, which alternate with vacant positions alongb; this feature is also observed in other Pb oxy-sulphosalts likescainiite. The material from the Pollone mine has the 8 Å structure, modular, which is topologically derived frompellouxite.