Classification of Bariomicrolite |
| IMA status: | Approved |
|---|
| Strunz 8th edition ID: | 4/C.18-40
|
|---|
| Nickel-Strunz 10th (pending) edition ID: | 4.DH.15
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates) D : Metal: Oxygen = 1:2 and similar H : With large (+- medium-sized) cations; sheets of edge-sharing octahedra |
|---|
| Dana 8th edition ID: | 8.2.2.2
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM 2 : A2B2O6(O,OH,F) |
|---|
| Hey's CIM Ref.: | 18.1.15
18 : Niobates and Tantalates 1 : Niobates and tantalates containing neither rare earths nor U |
|---|
| mindat.org URL: | http://www.mindat.org/min-526.html Please feel free to link to this page. |
|---|
Type Occurrence of Bariomicrolite |
| Type Locality: | Chi-Chico, São João del Rei, Mortes valley, Minas Gerais, Southeast Region, Brazil |
|---|
| General Appearance of Type Material: | Intergrowths with microlite, may be partially metamict |
|---|
| Geological Setting of type material: | Alluvial concentrates derived from a pegmatite |
|---|
| Associated Minerals at type locality: | |
|---|
Physical Properties of Bariomicrolite |
| Lustre: | Resinous, Dull |
|---|
| Diaphaneity (Transparency): | Opaque |
|---|
| Colour: | Yellowish to orangish |
|---|
| Hardness (Mohs): | 4½ - 5 |
|---|
| Hardness (Vickers): | VHN100=485 - 498 |
|---|
| Tenacity: | Brittle |
|---|
| Fracture: | Irregular/Uneven |
|---|
| Density (measured): | 5.68 - 5.8 g/cm3 |
|---|
| Density (calculated): | 5.51 g/cm3 |
|---|
Crystallography of Bariomicrolite |
| Crystal System: | Isometric |
|---|
| Class (H-M): | m3m (4/m 3 2/m) - Hexoctahedral |
|---|
| Space Group: | Fd3m {F41/d 3 2/m} |
|---|
| Cell Parameters: | a = 10.57Å
|
|---|
| Unit Cell Volume: | V 1,180.93 ų (Calculated from Unit Cell) |
|---|
| Z: | 8 |
|---|
| Morphology: | Intergrowths with microlite |
|---|
| X-Ray Powder Diffraction: | | d-spacing | | Intensity | | 3.034 | | (100) | | 6.04 | | (80) | | 3.18 | | (65) | | 2.631 | | (60) | | 1.865 | | (60) | | 1.591 | | (45) |
|
|---|
| Comments: | Recorded on type material |
|---|
Optical Data of Bariomicrolite |
| Type: | Isotropic |
|---|
Chemical Properties of Bariomicrolite |
| Formula: | |
|---|
| Essential elements: | Ba, O, Ta |
|---|
| All elements listed in formula: | Ba, H, Nb, O, Ta |
|---|
| Analytical Data: | Analysis of type material; empirical formula calculated after deduction of microlite (3.68 wt.-%), tantalite (0.26 wt.-%), cassiterite (0.12 wt.-%), quartz and feldspar, with Tl considered a contaminant introduced during the separation
U3O8 (1.68)
Ta2O5 (71.59)
Nb2O5 (5.87)
SiO2 (1.2)
TiO2 (1.21)
ThO2 (0.19)
SnO2 (2.05)
Al2O3 (0.42)
As2O3 (0.12)
Sb2O3 (0.01)
Bi2O3 (0.03)
Ce2O3 (0.45)
FeO (0.93)
MnO (0.09)
CuO (0.06)
PbO (0.90)
CaO (0.47)
SrO (0.09)
BaO (4.85)
Ag2O (0.01)
Tl2O (1.56)
H2O (6.9)
sum 100.68 wt.-% |
|---|
| Empirical Formula: | | (Ba,Fe,U,···) | | (Ta,Nb,Ti,Sn) | | O | | (H | | O) | | |
|
|---|
Relationship of Bariomicrolite to other Species |
| Member of Group: | |
|---|
Related Minerals - Nickel-Strunz Grouping):
- + | |
|---|
Related Minerals - Hey's Index Grouping:
- + | |
|---|
Other Names for Bariomicrolite |
| 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 Bariomicrolite |
| Reference List: | van der Veen, A. H. (1963): A study of pyrochlore. Verhandel. Kon. Nederlands Geol. Mijnbouwkundig Genootschap. Geol. Ser. 22, 188 p. - American Mineralogist (1963), 48, 1415 (abstract).
Hogarth, D. D. (1977): Classification and nomenclature of the pyrochlore group. American Mineralogist 62, 403-410, esp. 406-407.
Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 41. |
|---|
Internet Links for Bariomicrolite |
| Search Engines: |
Look for Bariomicrolite on Google
Look for Bariomicrolite images on Google |
|---|
| External Links: | Look for Bariomicrolite on WebmineralLook for Bariomicrolite on Athena MineralogyLook for Bariomicrolite on WikipediaLook for Bariomicrolite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseSearch for Bariomicrolite in the Natural History Museum (London) online catalogueBariomicrolite details from Handbook of Mineralogy (PDF) |
|---|
| Mineral Dealers: | Buy minerals from Mineralium.comBuy Fine Minerals from mineralsweb.comFind Bariomicrolite on www.crystalclassics.co.ukThe Arkenstone - Fine MineralsWilensky Fine MineralsLapis Mineral MagazinSpiriferMinerals.com - high quality specimensRare and Unusual minerals at Mineralogical Research CompanyFabre Minerals - search for Bariomicrolite specimensFine Minerals from Dan Weinrich MineralsTop quality minerals from Kristalle of CaliforniaBuy from David K Joyce minerals |
|---|
| Jobs: | Mining & Geology Jobs |
|---|
Page Sponsor |
| Sponsorship: | This page is currently not sponsored. Click here to sponsor this page. |
|---|
Localities for Bariomicrolite |