Images
Formula: S
Element, sulphur group, monoclinic
paramorph of clinosulphur,
that is also monoclinic, and orthorhombic sulphur
Crystal System: Monoclinic
Specific gravity: 2.02 calculated
Hardness: 2 to 3
Colour: Colourless to pale yellow with a greenish tinge
Solubility: Soluble in benzol, methylene iodide and carbon bisulfide
Environments
Sedimentary environments
Fumeroles
Rosickýite is the densest form of solid S; it changes to sulphur in
time at room temperature
(Mindat). It is found in fumaroles and in hollow limonite nodules
(Webmin).
Localities
At the type locality, Havírna, Letovice, Blansko District, South Moravian Region, Czech Republic, rosickýite
occurs in the centre of hollow limonite nodules. These nodules, about
walnut size, are found in a thin stratum of clay. The crystals are mostly
less than 0.5 mm in size
(AM 17.251-252).
At the La Fossa crater, Vulcano Island, Lipari, Eolie Islands, Metropolitan City of Messina, Sicily, Italy,
rosickýite occurs in fumaroles
(HOM).
At the La Presta asphalt mine, Val-de-Travers, Neuchâtel, Switzerland, rosickýite is an alteration product of
pyrite-rich asphalt. Associated minerals include
pyrite, gypsum,
rozenite, sulphur,
calcite, limonite and asphalt
(HOM).
At Death Valley, Inyo county, California, USA, rosickýite is formed from
gypsum and stabilised due to microbial activity
(HOM).
Back to Minerals