Classification of Alflarsenite |
| IMA status: | Approved 2008 |
|---|
| mindat.org URL: | http://www.mindat.org/min-38701.html
Please feel free to link to this page. |
|---|
Type Occurrence of Alflarsenite |
| Type Locality: | Tuften (Tuften 1 Quarry; Tuften 2 Quarry), Tvedalen, Larvik, Vestfold, Norway |
|---|
| Place of Conservation of Type Material: | Holotype in the Natural History Museum, University of Oslo (catalogue number 42108). A small part of the holotype material is housed at the Canadian Museum of Nature, Ottawa (catalogue number CMNMC 86066). |
|---|
| Year of Discovery: | 1969 |
|---|
| Geological Setting of type material: | Syenitic pegmatite |
|---|
| Associated Minerals at type locality: | |
|---|
Physical Properties of Alflarsenite |
| Lustre: | Vitreous |
|---|
| Diaphaneity (Transparency): | Transparent, Translucent |
|---|
| Colour: | Colorless |
|---|
| Comment: | In aggregates the colour is very pale beige |
|---|
| Streak: | White |
|---|
| Hardness (Mohs): | 4 |
|---|
| Hardness Data: | Estimated |
|---|
| Tenacity: | Very brittle |
|---|
| Cleavage: | None Observed |
|---|
| Parting: | Not observed |
|---|
| Fracture: | Irregular/Uneven |
|---|
| Density (calculated): | 2.605 g/cm3 |
|---|
Crystallography of Alflarsenite |
| Crystal System: | Monoclinic |
|---|
| Class (H-M): | 2 - Sphenoidal |
|---|
| Space Group: | P21 {P1 1 21} {P21} {P1 21 1} |
|---|
| Cell Parameters: | a = 7.1222Å, b = 19.8378Å, c = 9.8071Å
β = 111.287° |
|---|
| Ratio: | a:b:c = 0.359 : 1 : 0.494 |
|---|
| Unit Cell Volume: | V 1,291.10 ų (Calculated from Unit Cell) |
|---|
| Morphology: | Bladed, flattened on (010) and elongate on [100]. Identified crystal forms are:
major pedions {010} and {010}, major pinacoid {001}, and minor pinacoid {201}. |
|---|
| Twinning: | Occurs on {001} |
|---|
| X-Ray Powder Diffraction: | | d-spacing | | Intensity | | 9.095 | | (100) | | 6.279 | | (42) | | 4.189 | | (32) | | 3.972 | | (76) | | 3.205 | | (37) | | 2.964 | | (70) | | 2.915 | | (92) | | 1.7820 | | (9) |
|
|---|
Optical Data of Alflarsenite |
| Type: | Biaxial (+) |
|---|
| RI values: | nα = 1.578 nβ = 1.580 nγ = 1.583 |
|---|
| Birefringence: | Low,0.0005 |
|---|
| Maximum Birefringence: | δ = 0.005
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration. |
|---|
| Surface Relief: | Moderate |
|---|
Chemical Properties of Alflarsenite |
| Formula: | |
|---|
| Essential elements: | Be, Ca, H, Na, O, Si |
|---|
| All elements listed in formula: | Be, Ca, H, Na, O, Si |
|---|
Other Names for Alflarsenite |
| 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 Alflarsenite |
Reference List:
- + | - IMA website - Proposals approved in August 2008
- Raade, G., Grice, J.D., Cooper, M.A. (2009): Alflarsenite, a new beryllium-silicate zeolite from a syenitic pegmatite in the Larvik plutonic complex, Oslo Region, Norway. European Journal of Mineralogy, 21, 893-900
- Grice, J.D., Raade, G., Cooper, M.A. (2010): Alflarsenite: Structure and relationship to other Be-Si and zeolite framework structures. Canadian Mineralogist, 48, 255-266 |
|---|
Internet Links for Alflarsenite |
| Search Engines: |
Look for Alflarsenite on Google
Look for Alflarsenite images on Google |
|---|
| External Links: | Look for Alflarsenite on WebmineralLook for Alflarsenite on Athena MineralogyLook for Alflarsenite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure Database |
|---|
| Mineral Dealers: | Buy fine minerals and gemstones from Pala InternationalFine Minerals from Weinrich Minerals, Inc.Find Alflarsenite on www.crystalclassics.co.ukDAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.High-end worldwide specimens & outstanding customer serviceBuy from David K Joyce mineralsPricedownminerals.com - Reverse Auctions and ShopBy minerals from YourMineralCollectionTop quality minerals from Kristalle of CaliforniaSearch for - Alflarsenite - on e-Rocks Mineral Sales & AuctionsSearch for minerals at HeliodorEdwards Minerals - Fine Specimens |
|---|
| Jobs: | Mining & Geology Jobs |
|---|
Localities for Alflarsenite |
|
Mineral and Locality Search
