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About YanomamiteHide

InAsO4 · 2H2O
Pale green to yellow green.
3 - 4
Crystal System:
Member of:
Named after the Yanomani people of the Amazon basin.
Forms a partial series with Scorodite.

Classification of YanomamiteHide

Approval Year:

C : Phosphates without additional anions, with H2O
D : With only medium-sized cations, RO4:H2O = 1:2

4 : (AB)5(XO4)2·xH2O

Physical Properties of YanomamiteHide

Pale green to yellow green.
3 - 4 on Mohs scale
VHN25=571 - 743 kg/mm2 - Vickers

Optical Data of YanomamiteHide

Biaxial (+)
relatively strong

Chemical Properties of YanomamiteHide

InAsO4 · 2H2O
IMA Formula:
In(AsO4) · 2H2O
Common Impurities:

Crystallography of YanomamiteHide

Crystal System:
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Cell Parameters:
a = 10.446(6) Å, b = 9.085(4) Å, c = 10.345(6) Å
a:b:c = 1.15 : 1 : 1.139
Unit Cell V:
981.8 ų

Epitaxial Relationships of YanomamiteHide

Epitaxial Minerals:
ScoroditeFe3+AsO4 · 2H2O
Epitaxy Comments:
overgrown by scorodite

X-Ray Powder DiffractionHide

Powder Diffraction Data:
5.70 Å(70)
5.16 Å(40)
4.53 Å(100)
4.163 Å(50)
3.874 Å(60)
3.250 Å(60)
3.110 Å(50)

Type Occurrence of YanomamiteHide

General Appearance of Type Material:
dipyramidal crystals, to 0.2 mm; typically in crusts

Synonyms of YanomamiteHide

Other Language Names for YanomamiteHide


Relationship of Yanomamite to other SpeciesHide

Member of:
Other Members of this group:
MansfielditeAlAsO4 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca
ScoroditeFe3+AsO4 · 2H2OOrth. mmm (2/m 2/m 2/m)
StrengiteFePO4 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca
VarisciteAlPO4 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca
Forms a series with:

Common AssociatesHide

Associated Minerals Based on Photo Data:
4 photos of Yanomamite associated with ScoroditeFe3+AsO4 · 2H2O
1 photo of Yanomamite associated with TopazAl2(SiO4)(F,OH)2
1 photo of Yanomamite associated with CassiteriteSnO2
1 photo of Yanomamite associated with QuartzSiO2

Related Minerals - Nickel-Strunz GroupingHide

8.CD.CastellaroiteMn2+3(AsO4)2·4H2OMon. 2/m
8.CD.05KolbeckiteScPO4 · 2H2OMon. 2/m
8.CD.05MetavarisciteAlPO4 · 2H2OMon. 2/m : P21/b
8.CD.05PhosphosideriteFePO4 · 2H2OMon. 2/m
8.CD.05UM2005-02-AsO:AlHPScSiScAsO4 · 2H2O
8.CD.10MansfielditeAlAsO4 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.CD.10ScoroditeFe3+AsO4 · 2H2OOrth. mmm (2/m 2/m 2/m)
8.CD.10StrengiteFePO4 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.CD.10VarisciteAlPO4 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.CD.15ParascoroditeFeAsO4 · 2H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mcm
8.CD.20LudlamiteFe2+3(PO4)2 · 4H2OMon. 2/m : P21/b
8.CD.25SterlinghilliteMn2+3(AsO4)2 · 3H2OTric. 1 : P1
8.CD.30RollanditeCu3(AsO4)2 · 4H2OOrth.

Related Minerals - Dana Grouping (8th Ed.)Hide · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca · 2H2OOrth. mmm (2/m 2/m 2/m) · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for YanomamiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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)

Internet Links for YanomamiteHide

Localities for YanomamiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Brazil (TL)
  • Goiás
    • Monte Alegre de Goiás
Eur.Jour.Min. 6:245; Márcia Abrahão Moura, Nilson Francisquini Botelho and Fábio Carvalho de Mendonça (2007): The indium-rich sulfides and rare arsenates of the Sn–In-mineralized Mangabeira A-type granite, Central Brazil. Canadian Mineralogist 45, 485-496.
  • Braga
    • Braga
      • Mire de Tibães
DGEG, Boletim de Minas Vol. 47 no. 2, Lisboa 2012 (Alves et al., 2010)
Mineral and/or Locality  
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