Classification of Jôkokuite |
| IMA status: | Approved |
|---|
| Strunz 8th edition ID: | 6/C.04-30
|
|---|
| Nickel-Strunz 10th (pending) edition ID: | 7.CB.20
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates) C : Sulfates (selenates, etc.) without additional anions, with H2O B : With only medium-sized cations |
|---|
| Dana 8th edition ID: | 29.6.7.4
29 : HYDRATED ACID AND NORMAL SULFATES 6 : AXO4·xH2O |
|---|
| Hey's CIM Ref.: | 25.9.2
25 : Sulphates 9 : Sulphates of Mn |
|---|
| mindat.org URL: | http://www.mindat.org/min-2109.html Please feel free to link to this page. |
|---|
Type Occurrence of Jôkokuite |
| Type Locality: | Johkoku mine (Jôkoku; Jokoku mine), Kaminokuni, Oshima peninsula, Hokkaido Island, Japan |
|---|
| Year of Discovery: | 1978 |
|---|
Physical Properties of Jôkokuite |
| Lustre: | Vitreous |
|---|
| Colour: | Pink |
|---|
| Streak: | White |
|---|
| Hardness (Mohs): | 2½ |
|---|
Crystallography of Jôkokuite |
| Crystal System: | Triclinic |
|---|
| Cell Parameters: | a = 6.37Å, b = 10.77Å, c = 6.13Å α = 98.77°, β = 109.95°, γ = 75.03° |
|---|
| Ratio: | a:b:c = 0.591 : 1 : 0.569 |
|---|
| Unit Cell Volume: | V 380.94 ų (Calculated from Unit Cell) |
|---|
Optical Data of Jôkokuite |
| Type: | Biaxial (-) |
|---|
| RI values: | nα = 1.498 nβ = 1.510 nγ = 1.517 |
|---|
| 2V: | Measured: 70° to 80°, Calculated: 74° |
|---|
| Maximum Birefringence: | δ = 0.019
 Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration. |
|---|
| Surface Relief: | Low |
|---|
| Dispersion: | very weak |
|---|
Chemical Properties of Jôkokuite |
| Formula: | |
|---|
| Essential elements: | H, Mn, O, S |
|---|
| All elements listed in formula: | H, Mn, O, S |
|---|
Relationship of Jôkokuite to other Species |
| Member of Group: | |
|---|
Related Minerals - Nickel-Strunz Grouping):
- + | |
|---|
Related Minerals - Hey's Index Grouping:
- + | |
|---|
Other Names for Jôkokuite |
| Synonyms: | |
|---|
| Other Languages: | |
|---|
Other Information |
| Health Warning: | No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care. |
|---|
References for Jôkokuite |
| Reference List: | American Mineralogist (1979): 64: 655.
|
|---|
Internet Links for Jôkokuite |
| Search Engines: |
Look for Jôkokuite on Google
Look for Jôkokuite images on Google |
|---|
| External Links: | Look for Jôkokuite on WebmineralLook for Jôkokuite on Athena MineralogyLook for Jôkokuite on WikipediaLook for Jôkokuite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseSearch for Jôkokuite in the Natural History Museum (London) online catalogueJokokuite details from Handbook of Mineralogy (PDF) |
|---|
| Mineral Dealers: | SpiriferMinerals.com - high quality specimensMineral Classics - Worldwide Collector Quality Minerals and GemsThe Arkenstone - Fine MineralsFabre Minerals - search for Jôkokuite specimensWilensky Fine MineralsDAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.Buy Minerals and Crystals from Crystalarium.comRare and Unusual minerals at Mineralogical Research Companyrare and unusual minerals mainly crystallizedLapis Mineral MagazinSearch for - Jôkokuite - on e-Rocks Mineral Sales & AuctionsEdwards Minerals - Fine Specimens |
|---|
| Jobs: | Mining & Geology Jobs |
|---|
Page Sponsor |
| Sponsorship: | This page is currently not sponsored. Click here to sponsor this page. |
|---|
Localities for Jôkokuite |