Classification of Yanomamite |
| IMA status: | Approved 1990 |
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| Strunz 8th edition ID: | 7/C.09-85
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| Nickel-Strunz 10th (pending) edition ID: | 8.CD.10
8 : PHOSPHATES, ARSENATES, VANADATES C : Phosphates without additional anions, with H2O D : With only medium-sized cations, RO4:H2O = 1:2 |
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| Dana 8th edition ID: | 40.4.1.5
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES 4 : (AB)5(XO4)2·xH2O |
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| mindat.org URL: | http://www.mindat.org/min-4352.html Please feel free to link to this page. |
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Type Occurrence of Yanomamite |
| Type Locality: | Mangabeira Tin Mine, Monte Alegre de Goiás, Mangabeira Massif, Goiás, Central-West Region, Brazil |
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| General Appearance of Type Material: | dipyramidal crystals, to 0.2 mm; typically in crusts |
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Physical Properties of Yanomamite |
| Lustre: | Vitreous |
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| Diaphaneity (Transparency): | Transparent |
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| Colour: | Pale green to yellow green. |
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| Streak: | White |
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| Hardness (Mohs): | 3 - 4 |
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| Hardness (Vickers): | VHN25=571 - 743 kg/mm2 |
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Crystallography of Yanomamite |
| Crystal System: | Orthorhombic |
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| Class (H-M): | mmm (2/m 2/m 2/m) - Dipyramidal |
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| Space Group: | Pbca (P21/b 21/c 21/a) |
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| Cell Parameters: | a = 10.446(6) Å, b = 9.085(4) Å, c = 10.345(6) Å
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| Ratio: | a:b:c = 1.15 : 1 : 1.139 |
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| Unit Cell Volume: | V 981.8 ų |
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| Z: | 8 |
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Epitaxial Relationships of Yanomamite |
| Epitaxial Minerals: | |
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| Epitaxi Comments: | overgrown by scorodite |
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| X-Ray Powder Diffraction: | | d-spacing | | Intensity | | 5.70 | | (70) | | 5.16 | | (40) | | 4.53 | | (100) | | 4.163 | | (50) | | 3.874 | | (60) | | 3.250 | | (60) | | 3.110 | | (50) |
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Optical Data of Yanomamite |
| Type: | Biaxial (+) |
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| Dispersion: | relatively strong |
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Chemical Properties of Yanomamite |
| Formula: | |
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| Essential elements: | As, H, In, O |
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| All elements listed in formula: | As, H, In, O |
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| Common Impurities: | Fe,Al |
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Relationship of Yanomamite to other Species |
| Series: | Forms a series with Scorodite (see here) |
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| Related Minerals - Nickel-Strunz Grouping): | |
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Other Names for Yanomamite |
| Synonyms: | |
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| German names: | |
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| Spanish names: | |
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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. |
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References for Yanomamite |
| Reference List: | Botelho, N.F., Roger, G., D`Yvoire, F., Moëlo, Y. & Volfinger, M. (1994): Yanomamite, InAsO4.2H2O, a new indium mineral from topaz-bearing greisen in the Goiás Tin Province, Brazil. European Journal of Mineralogy: 6: 245-254.
[Am.Min. 80, 186(1995)(abstract)]
Tang, X., Gentiletti, M. J. & Lachgar, A. (2002): Synthesis and crystal structure of indium arsenate and phosphate dihydrates with variscite and metavariscite structure types. Journal of Chemical Crystallography 31, 45-50.
Chen, Z.-X., Weng, L.-H., Zhou, Y.-M., Zhang, H.-Y. & Zhao, D.-Y. (2002): Synthesis and structure of a new three-dimensional microporous indium arsenate. Huaxue Xuebao 60, 305-309. (in Chinese) |
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Internet Links for Yanomamite |
| Search Engines: |
Look for Yanomamite on Google
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| External Links: | Look for Yanomamite on WebmineralLook for Yanomamite on Athena MineralogyLook for Yanomamite on WikipediaLook for Yanomamite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseSearch for Yanomamite in the Natural History Museum (London) online catalogueYanomamite details from Handbook of Mineralogy (PDF) |
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Localities for Yanomamite |