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Yanomamite (Yanomamit)

Pictures (2 Images total)

blassgrüne Yanomamit xx auf Skorodit (braun)
Views (File:
1257614007
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blassgrüne Yanomamit xx auf Skorodit (braun)
Kristallgröße: 0,0192 mm; Fundort: Mangabeira, Monte Alegra de Goias, Goias, Mittlerer Westen, Brasilien
Copyright: Maurice de Graaf; Contribution: slugslayer
Location: Brasilien/Mittelwesten (Região Centro-Oeste)/Goiás/Monte Alegre de Goiás/Mangabeira
Mineral: Yanomamite
Image: 1257614007
Rating: 6 (votes: 2)
License: Usage for Mineralienatlas project only
blassgrüne Yanomamit xx auf Skorodit (braun)

Kristallgröße: 0,0192 mm; Fundort: Mangabeira, Monte Alegra de Goias, Goias, Mittlerer Westen, Brasilien
Copyright: Maurice de Graaf
Contribution: slugslayer 2009-11-07
Locality: Mangabeira / Monte Alegre de Goiás / Goiás / Mittelwesten (Região Centro-Oeste) / Brasilien
YANOMAMIT
Views (File:
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YANOMAMIT
Brasilien/Mittelwesten (Região Centro-Oeste)/Goiás/Monte Alegre de Goiás/Mangabeira BB.: ca. 3mm
Copyright: Daniel Neumann; Contribution: Neumann
Collection: Daniel Neumann, Collection number: 00688.
Location: Brasilien/Mittelwesten (Região Centro-Oeste)/Goiás/Monte Alegre de Goiás/Mangabeira
Mineral: Yanomamite
Image: 1349617274
Rating: 1 (votes: 1)
License: Usage for Mineralienatlas project only
YANOMAMIT (SNr: 00688.)

Brasilien/Mittelwesten (Região Centro-Oeste)/Goiás/Monte Alegre de Goiás/Mangabeira BB.: ca. 3mm
Collection: Daniel Neumann
Copyright: Daniel Neumann
Contribution: Neumann 2012-10-07
Locality: Mangabeira / Monte Alegre de Goiás / Goiás / Mittelwesten (Região Centro-Oeste) / Brasilien

Collectors Summary

Color blau grün, hellgrün, hellgelbgrün
Streak color weiß
Hardness (Mohs) 5.75
Cleavages keine
Fracture halbmuschelig
Solubility +++ konz. HCl, konz. H2SO4
Crystal System orthorhombisch, Pbca

Chemism

Chemical formula

In[AsO4]·2H2O

Chemical composition

Arsen, Indium, Sauerstoff, Wasserstoff

Unit weight: 289.76827 u; Number of atoms in the formula: 12

Info

Empirical formula:

In[AsO4]·2H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

1.39

4

33.33

1.0079470

4.0317880
Oxygen

O

33.13

6

50.00

15.9994300

95.9965800
Arsenic

As

25.86

1

8.33

74.9216020

74.9216020
Indium

In

39.62

1

8.33

114.8183000

114.8183000

Strunz 9th edition incl. updates

8.CD.10

8: Phosphate, Arsenate, Vanadate
C: Phosphate ohne weitere Anionen, mit H2O
D: Mit ausschließlich mittelgroßen Kationen, RO4:H2O = 1:2
10:Variscit-Gruppe

Lapis Classification

VII/C.09-085

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
C: Wasserhaltige Phosphate, ohne fremde Anionen
9: Kleine und mittelgroße Kationen: Be und Al-Mn-Fe-Cu-Zn-Mg

Classification by Hölzel

8.CC.280

8: PHOSPHATES ARSENATES VANADATES
C: Phosphates (-Anions +Water)
C: Valency: 3,4 C medium
2: XO4/H2O=1/2, monoclinic Phosphosiderite-Group

Dana 8th edition

40.04.01.05

40: Hydrated Phosphates, etc
04: Hydrated Phosphates, etc where A+++ XO4 · x(H2O)
01: Variscite Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Variscite group

Optical Properties

Color

blau grün, hellgrün, hellgelbgrün

Streak color

weiß

Diaphaneity (Transparency)

transparent

RI value α / ω / n

1.65

Ri mean

1.65 mea

2V angle

Biaxial (-) 65!°

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

61

Space Group

Pbca

Cell parameters a (Å)

10.446

Cell parameters b (Å)

9.085

Cell parameters c (Å)

10.345

Cell parameters a/b or c/a

1.150

Cell parameters c/b

1.139

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

8

Volumne (ų)

981.76

X-Ray Powder Diffraction

5.70(70),
5.16(40),
4.53(100),
4.163(50),
3.874(60),
3.250(60),
3.110(50),
2.656(40)
XRD chart Yanomamite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

5.75

VHN (Hardness Vickers)

631 (25g)

Density (g/cm³)

3.87

3.921 ( ρ calc. Mineralienatlas )

Cleavages

keine

Fracture

halbmuschelig

Tenacity

spröde

Instability

+++ konz. HCl, konz. H2SO4

(Co-)Type locality

(Co-)Type locality

Brasilien/Mittelwesten (Região Centro-Oeste)/Goiás/Monte Alegre de Goiás/Mangabeira

Preface

Associations

Indiumhaltiger Skorodit

Name from

dem indigenen Volk der Yanomami, Amazonas

Author (Name, Year)

Botelho & Roger & d'Yvoire & Moëlo & Volfinger, 1994

References

European Journal of Mineralogy 6 (1994), 245

IMA group assignments

 
Variscite group
 
orthorhombisch
Pbca

 
 
Scorodite
Fe3+AsO4·2H2O
orthorhombisch
Pcab

 
 
Strengite
Fe3+PO4·2H2O
orthorhombisch
Pbca

 
 
Variscite
AlPO4·2H2O
orthorhombisch
Pbca

 
 
Yanomamite
In[AsO4]·2H2O
orthorhombisch
Pbca

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Actuality: 29. Mar 2023 - 17:39:52

Other languages

German

Yanomamit

Spanish

Yanomamita

English

Yanomamite

French

Yanomamite

CNMNC (IMA)-Number

IMA 1990-052

CNMNC symbol

Symbol

Yan

Locations with GPS information