Classification of Bigcreekite |
| IMA status: | Approved 1999 |
|---|
| Nickel-Strunz 10th (pending) edition ID: | 9.DF.30
9 : SILICATES (Germanates)
D : Inosilicates
F : Inosilicates with 2-periodic multiple chains |
|---|
| mindat.org URL: | http://www.mindat.org/min-7083.html
Please feel free to link to this page. |
|---|
Type Occurrence of Bigcreekite |
| Type Locality: | Esquire No. 7 claim, Big Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA |
|---|
| Geological Setting of type material: | In fractures in gneissic rocks. |
|---|
| Associated Minerals at type locality: | |
|---|
Physical Properties of Bigcreekite |
| Lustre: | Vitreous, Pearly |
|---|
| Colour: | White to colourless |
|---|
| Streak: | White |
|---|
| Hardness (Mohs): | 2 - 3 |
|---|
| Hardness Data: | Measured |
|---|
| Tenacity: | Brittle |
|---|
| Cleavage: | Perfect
{010} and {001} |
|---|
| Fracture: | Irregular/Uneven |
|---|
| Density (measured): | 2.66 g/cm3 |
|---|
| Density (calculated): | 2.76 g/cm3 |
|---|
Crystallography of Bigcreekite |
| Crystal System: | Orthorhombic |
|---|
| Class (H-M): | mmm (2/m 2/m 2/m) - Dipyramidal |
|---|
| Space Group: | Pnma {P21/n 21/m 21/a} |
|---|
| Cell Parameters: | a = 5.038Å, b = 9.024Å, c = 18.321Å
|
|---|
| Ratio: | a:b:c = 0.558 : 1 : 2.03 |
|---|
| Unit Cell Volume: | V 833 ų |
|---|
| Z: | 4 |
|---|
| Twinning: | None mentioned |
|---|
Optical Data of Bigcreekite |
| Type: | Biaxial (+) |
|---|
| RI values: | nα = 1.537 nβ = 1.538 nγ = 1.541 |
|---|
| 2V: | Measured: 59° , Calculated: 62° |
|---|
| Maximum Birefringence: | δ = 0.004
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration. |
|---|
| Surface Relief: | Low |
|---|
| Dispersion: | r < v moderate |
|---|
| Pleochroism: | Non-pleochroic |
|---|
Chemical Properties of Bigcreekite |
| Formula: | |
|---|
| Essential elements: | Ba, H, O, Si |
|---|
| All elements listed in formula: | Ba, H, O, Si |
|---|
| Analytical Data: | Measure of four sets of electron microprobe data with H2O calculated to give 4H2O.
Na2O (0.11)
CaO (0.03)
BaO (48.88)
SrO (0.02)
SiO2 (38.16)
H2O (22.94) |
|---|
| Empirical Formula: | |
|---|
| Common Impurities: | Ca,Sr,Na |
|---|
Relationship of Bigcreekite to other Species |
Related Minerals - Nickel-Strunz Grouping):
- + | |
|---|
Other Names for Bigcreekite |
| 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 Bigcreekite |
Reference List:
- + | Canadian Mineralogist: 39: 761-768.
|
|---|
Internet Links for Bigcreekite |
| Search Engines: |
Look for Bigcreekite on Google
Look for Bigcreekite images on Google |
|---|
| External Links: | Look for Bigcreekite on WebmineralLook for Bigcreekite on Athena MineralogyLook for Bigcreekite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure Database |
|---|
| Mineral Dealers: | Top quality minerals from Kristalle of CaliforniaSearch for - Bigcreekite - on e-Rocks Mineral Sales & AuctionsBuy from David K Joyce mineralsMineral Classics - Worldwide Collector Quality Minerals and GemsSearch for minerals at HeliodorWilensky Fine MineralsDAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.Find Bigcreekite on www.crystalclassics.co.ukFabre Minerals - search for Bigcreekite specimensRare and Unusual minerals at Mineralogical Research CompanySpiriferMinerals.com - high quality low pricesSearch for Bigcreekite from all mineral dealers at minfind.com |
|---|
| Jobs: | Mining & Geology Jobs |
|---|
Localities for Bigcreekite |
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.
|
|
Mineral and Locality Search
