Classification of Jáchymovite |
| IMA status: | Approved 1994 |
|---|
| Strunz 8th edition ID: | 6/D.20-05
|
|---|
| Nickel-Strunz 10th (pending) edition ID: | 7.EA.10
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates) E : Uranyl sulfates A : Without cations |
|---|
| mindat.org URL: | http://www.mindat.org/min-7117.html Please feel free to link to this page. |
|---|
Type Occurrence of Jáchymovite |
| Type Locality: | Jáchymov (St Joachimsthal), Ostrov, Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic |
|---|
| General Appearance of Type Material: | as crusts of acicular crystals, to 0.1 mm |
|---|
| Place of Conservation of Type Material: | Natural History Museum, Prague, Czech Republic |
|---|
Physical Properties of Jáchymovite |
| Lustre: | Vitreous |
|---|
| Colour: | yellow |
|---|
| Streak: | pale yellow |
|---|
| Cleavage: | Very Good on {010} |
|---|
| Fracture: | Conchoidal |
|---|
| Density (calculated): | 4.79 g/cm3 |
|---|
Crystallography of Jáchymovite |
| Crystal System: | Monoclinic |
|---|
| Class (H-M): | 2/m - Prismatic |
|---|
| Space Group: | P21/m (P1 1 21/m) [P21/m] {P1 21/m 1} |
|---|
| Cell Parameters: | a = 18.553(8) Å, b = 9.276(2) Å, c = 13.532(7) Å β = 125.56(2)° |
|---|
| Ratio: | a:b:c = 2 : 1 : 1.459 |
|---|
| Unit Cell Volume: | V 1,894.52 ų (Calculated from Unit Cell) |
|---|
| Z: | 2 |
|---|
Optical Data of Jáchymovite |
| Type: | Biaxial (-) |
|---|
| RI values: | nα = 1.715 nβ = 1.718 nγ = 1.720 |
|---|
| 2V: | Calculated: 78° |
|---|
| Maximum Birefringence: | δ = 0.005
 Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration. |
|---|
| Surface Relief: | High |
|---|
| Dispersion: | r > v |
|---|
Chemical Properties of Jáchymovite |
| Formula: | |
|---|
| Essential elements: | H, O, S, U |
|---|
| All elements listed in formula: | H, O, S, U |
|---|
Relationship of Jáchymovite to other Species |
Related Minerals - Nickel-Strunz Grouping):
- + | |
|---|
Other Names for Jáchymovite |
| Synonyms: | |
|---|
| Other Languages: | |
|---|
Other Information |
| Fluorescence in UV light: | yellow uder both SW and LW UV |
|---|
| Health Warning: | radioactive |
|---|
References for Jáchymovite |
| Reference List: | Čejka, J., Sejkora, J., Mrazek, Z., Urbanec, Z. and Jarchovky, T. (1996): Jáchymovite, (UO2)8(SO4)(OH)14.13H2O, a new uranyl mineral from Jáchymov, the Krusne Hory Mts., Czech Republic, and its comparison with uranopilite. Neues Jahrbuch für Mineralogie, Abhandlungen: 170, 155-170.
Mineralogical Record: 28: 142-143.
|
|---|
Internet Links for Jáchymovite |
| Search Engines: |
Look for Jáchymovite on Google
Look for Jáchymovite images on Google |
|---|
| External Links: | Look for Jáchymovite on WebmineralLook for Jáchymovite on Athena MineralogyLook for Jáchymovite on WikipediaLook for Jáchymovite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseSearch for Jáchymovite in the Natural History Museum (London) online catalogueJáchymovite details from Handbook of Mineralogy (PDF) |
|---|
| Mineral Dealers: | Rare and Unusual minerals at Mineralogical Research CompanySearch for Jáchymovite on minvision.comThe Arkenstone - Fine MineralsSpiriferMinerals.com - high quality specimensWright's Rock Shop - excellent mineral specimens since 1970Search for - Jáchymovite - on e-Rocks Mineral Sales & AuctionsMineral Classics - Worldwide Collector Quality Minerals and GemsFine Minerals from Dan Weinrich Mineralsrare and unusual minerals mainly crystallizedBuy Fine Minerals from mineralsweb.comHigh-end worldwide specimens & outstanding customer serviceLapis Mineral Magazin |
|---|
| Jobs: | Mining & Geology Jobs |
|---|
Page Sponsor |
| Sponsorship: | This page is currently not sponsored. Click here to sponsor this page. |
|---|
Localities for Jáchymovite |