Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Mineral Chatroom The Mindat Store

Yanomamite

This page is currently not sponsored. Click here to sponsor this page.
Big Photo

Mangabeira deposit, Monte Alegre de Goiás, Goiás, Brazil
© Brent Thorne

Show Yanomamite Photos (10)



Formula:
InAsO
 
4
 · 2H
 
2
O
System:OrthorhombicColour:Pale green to yellow ...
Hardness:3 - 4
Member of:Variscite Group
Name:Named after the Yanomani people of the Amazon basin.


Forms a partial series with Scorodite.

Classification of Yanomamite

IMA status:Approved 1990
Strunz 8th edition ID:7/C.09-85
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
Dana 8th edition ID:40.4.1.5

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
4 : (AB)5(XO4)2·xH2O
mindat.org URL:http://www.mindat.org/min-4352.html
Please feel free to link to this page.

Type Occurrence of Yanomamite

Type Locality:Mangabeira deposit, Monte Alegre de Goiás, Goiás, Brazil
General Appearance of Type Material:dipyramidal crystals, to 0.2 mm; typically in crusts

Physical Properties of Yanomamite

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

Crystallography of Yanomamite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:Pbca {P21/b 21/c 21/a}
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 Volume:V 981.8 ų
Z:8

Epitaxial Relationships of Yanomamite

Epitaxial Minerals:
Scorodite
FeAsO
 
4
 · 2H
 
2
O
Epitaxi Comments:overgrown by scorodite
X-Ray Powder Diffraction:
d-spacingIntensity
5.70 (70)
5.16 (40)
4.53 (100)
4.163 (50)
3.874 (60)
3.250 (60)
3.110 (50)

Optical Data of Yanomamite

Type:Biaxial (+)
Dispersion:relatively strong

Chemical Properties of Yanomamite

Formula:
InAsO
 
4
 · 2H
 
2
O
Essential elements:As, H, In, O
All elements listed in formula:As, H, In, O
Common Impurities:Fe,Al

Relationship of Yanomamite to other Species

Series:Forms a series with Scorodite (see here)
Member of:Variscite Group
Other Members of Group:

- +
Mansfieldite
AlAsO
 
4
 · 2H
 
2
O
Scorodite
FeAsO
 
4
 · 2H
 
2
O
Strengite
FePO
 
4
 · 2H
 
2
O
Variscite
AlPO
 
4
 · 2H
 
2
O
Related Minerals - Nickel-Strunz Grouping):

- +
8.CD.05Kolbeckite
ScPO
 
4
 · 2H
 
2
O
8.CD.05Metavariscite
AlPO
 
4
 · 2H
 
2
O
8.CD.05Phosphosiderite
FePO
 
4
 · 2H
 
2
O
8.CD.05UM2005-02-AsO:AlHPScSi
ScAsO
 
4
 · 2H
 
2
O
8.CD.10Mansfieldite
AlAsO
 
4
 · 2H
 
2
O
8.CD.10Scorodite
FeAsO
 
4
 · 2H
 
2
O
8.CD.10Strengite
FePO
 
4
 · 2H
 
2
O
8.CD.10Variscite
AlPO
 
4
 · 2H
 
2
O
8.CD.15Parascorodite
FeAsO
 
4
 · 2H
 
2
O
8.CD.20Ludlamite
(Fe,Mn,Mg)
 
3
(PO
 
4
)
 
2
 · 4H
 
2
O
8.CD.25Sterlinghillite
Mn
 
3
(AsO
 
4
)
 
2
 · 4H
 
2
O
8.CD.30Rollandite
Cu
 
3
(AsO
 
4
)
 
2
 · 4H
 
2
O

Other Names for Yanomamite

Synonyms:
IMA1990-052
Other Languages:
German:Yanomamit
Spanish:Yanomamita

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 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)

Internet Links for Yanomamite

Search Engines:
  • Look for Yanomamite on Google
  • Look for Yanomamite images on Google
    • External Links:
  • Look for Yanomamite on Webmineral
  • Look for Yanomamite on Athena Mineralogy[Link Broken?]
  • Look for Yanomamite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Yanomamite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Visit the Pueblo Gem and Mineral show, Tucson 2012
  • Buy fine minerals and gemstones from Pala International
  • Search for minerals at Heliodor
  • Buy RARE Minerals from Rocks of Africa
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Edwards Minerals - Fine Specimens
  • Top quality minerals from Kristalle of California
  • webminerals
  • Rare and Unusual minerals at Mineralogical Research Company
  • Fine Minerals from Weinrich Minerals, Inc.
  • Buy from David K Joyce minerals
  • High-end worldwide specimens & outstanding customer service
    • Jobs:
  • Mining & Geology Jobs

    • Localities for Yanomamite

    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Brazil
     
    • 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.
    Mineral and/or Locality
    Search Google
     
    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
    Current server date and time: 27th Aug 2011 22:00:26
    Mineral and Locality Search
    Mineral:
    and/or Locality:
    Options
    Fade toolbar when not in focusFix toolbar to bottom of page
    Hide Social Media Links
    Slideshow frame delay seconds