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Yanomamite

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About YanomamiteHide

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


Classification of YanomamiteHide

Approved
Approval Year:
1990
8.CD.10

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
D : With only medium-sized cations, RO4:H2O = 1:2
40.4.1.5

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
4 : (AB)5(XO4)2·xH2O

Physical Properties of YanomamiteHide

Vitreous
Transparency:
Transparent
Colour:
Pale green to yellow green.
Streak:
White
Hardness:
3 - 4 on Mohs scale
Hardness:
VHN25=571 - 743 kg/mm2 - Vickers

Optical Data of YanomamiteHide

Type:
Biaxial (+)
Dispersion:
relatively strong

Chemical Properties of YanomamiteHide

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

Crystallography of YanomamiteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pbca
Cell Parameters:
a = 10.446(6) Å, b = 9.085(4) Å, c = 10.345(6) Å
Ratio:
a:b:c = 1.15 : 1 : 1.139
Unit Cell V:
981.8 ų
Z:
8

Epitaxial Relationships of YanomamiteHide

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

X-Ray Powder DiffractionHide

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

German:Yanomamit
Spanish:Yanomamita

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:
Scorodite4 photos of Yanomamite associated with Scorodite on mindat.org.
Topaz1 photo of Yanomamite associated with Topaz on mindat.org.
Cassiterite1 photo of Yanomamite associated with Cassiterite on mindat.org.
Quartz1 photo of Yanomamite associated with Quartz on mindat.org.

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 · 2H2OTrig.
8.CD.20LudlamiteFe2+3(PO4)2 · 4H2OMon. 2/m : P21/b
8.CD.25SterlinghilliteMn3(AsO4)2 · 4H2OTric. 1 : P1
8.CD.30RollanditeCu3(AsO4)2 · 4H2OOrth.

Related Minerals - Dana Grouping (8th Ed.)Hide

40.4.1.1VarisciteAlPO4 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca
40.4.1.2StrengiteFePO4 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca
40.4.1.3ScoroditeFe3+AsO4 · 2H2OOrth. mmm (2/m 2/m 2/m)
40.4.1.4MansfielditeAlAsO4 · 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

ⓘ - 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.
Portugal
 
  • Braga District
    • 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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