Classification of Eyselite |
| IMA status: | Approved 2003 |
|---|
| Nickel-Strunz 10th (pending) edition ID: | 4.DM.20
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates) D : Metal: Oxygen = 1:2 and similar M : With large (+- medium-sized) cations; unclassified |
|---|
| mindat.org URL: | http://www.mindat.org/min-27221.html Please feel free to link to this page. |
|---|
Type Occurrence of Eyselite |
| Type Locality: | Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia |
|---|
| General Appearance of Type Material: | Individual subhedral to (rare) euhedral crystals are platy to very thin prismatic, elongate [001], with a length-to-width ratio of approximately 3:1 and not exceeding 20 µm in maximum length. Typical crystals are 20 × 14 × 1 µm in size. Forms are {100} ma |
|---|
| Geological Setting of type material: | Very fine-grained aggregates in vugs of massive renierite – germanite – tennantite ore |
|---|
| Associated Minerals at type locality: | |
|---|
Physical Properties of Eyselite |
| Diaphaneity (Transparency): | Transparent, Translucent, Translucent on thin edges, Opaque |
|---|
| Colour: | Dirty brown-yellow (aggregates) to yellow-tan (crystals) |
|---|
| Streak: | Brownish-yellow |
|---|
| Density (calculated): | 3.639 g/cm3 |
|---|
Crystallography of Eyselite |
| Crystal System: | Orthorhombic |
|---|
| Cell Parameters: | a = 8.302Å, b = 9.718Å, c = 4.527Å
|
|---|
| Ratio: | a:b:c = 0.854 : 1 : 0.466 |
|---|
| Unit Cell Volume: | V 365.2 ų |
|---|
| Z: | 2 |
|---|
| X-Ray Powder Diffraction: | | d-spacing | | Intensity | | 4.105 | | (40) | | 3.681 | | (100) | | 3.121 | | (60b) | | 121) | | ( | | 2.921 | | (100) | | 2.512 | | (40) | | 2.403 | | (90) | | 1.646 | | (80) |
|
|---|
Optical Data of Eyselite |
| Type: | Biaxial (+) |
|---|
Chemical Properties of Eyselite |
| Formula: | |
|---|
| All elements listed in formula: | Fe, Ge, H, O |
|---|
| Analyical Data: | The infrared-absorption spectrum shows bands for structural (OH). A micro-XAS study shows that all the Fe is trivalent, and the Ge atoms are probably in octahedral coordination.
CaO (0.06)
Fe2O3 (18.54)
Ga2O3 (1.01)
GeO2 (77.75)
H2O (2.64) (by difference)
total 100.00 wt.% |
|---|
| Empirical Formula: | |
|---|
Relationship of Eyselite to other Species |
Related Minerals - Nickel-Strunz Grouping):
- + | |
|---|
Other Names for Eyselite |
| 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 Eyselite |
| Reference List: | Roberts, A.C., Seward, T.M., Reusser, E., Carpenter, G.J.C., Grice, J.D., Clark, S.M., and Marcus. M.A. (2004): Eyselite, Fe3+Ge4+3O7(OH), a new mineral species from Tsumeb, Namibia. Canadian Mineralogist, 42, 1771-1776. |
|---|
Articles/Blogs about Eyselite |
Internet Links for Eyselite |
| Search Engines: |
Look for Eyselite on Google
Look for Eyselite images on Google |
|---|
| External Links: | Look for Eyselite on WebmineralLook for Eyselite on Athena MineralogyLook for Eyselite on WikipediaLook for Eyselite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseSearch for Eyselite in the Natural History Museum (London) online catalogue |
|---|
| Mineral Dealers: | Find Eyselite on www.crystalclassics.co.ukBuy from David K Joyce mineralsHigh-end worldwide specimens & outstanding customer serviceRare and Unusual minerals at Mineralogical Research CompanyWright's Rock Shop - excellent mineral specimens since 1970Buy Minerals and Crystals from Crystalarium.comThe Arkenstone - Fine MineralsMineral Classics - Worldwide Collector Quality Minerals and GemsSearch for - Eyselite - on e-Rocks Mineral Sales & AuctionsBuy fine minerals and gemstones from Pala InternationalSearch for Eyselite at Thames Valley Mineralsrare and unusual minerals mainly crystallized |
|---|
| Jobs: | Mining & Geology Jobs |
|---|
Page Sponsor |
| Sponsorship: | This page is currently not sponsored. Click here to sponsor this page. |
|---|
Localities for Eyselite |
The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the  symbol to view information about a locality.
The  symbol next to localities in the list
can be used to jump to that position on the map. These maps work faster with Firefox!
|