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Jamesite

Pictures (4 Images total)

brauner Jamesit mit Duftit
Views (File:
1247426886
): 1783
brauner Jamesit mit Duftit
Bildbreite: 4 mm; Fundort: Tsumeb Mine, Otjikoto Region, Namibia
Copyright: Joachim Esche; Contribution: Philip Blümner
Location: Namibia/Oshikoto (Otjikoto), Region/Tsumeb/Tsumeb Mine
Mineral: Jamesite
Image: 1247426886
Rating: 7 (votes: 1)
License: Usage for Mineralienatlas project only
brauner Jamesit mit Duftit

Bildbreite: 4 mm; Fundort: Tsumeb Mine, Otjikoto Region, Namibia

Copyright: Joachim Esche
Contribution: Philip Blümner 2009-07-12
Locality: Tsumeb Mine / Tsumeb / Oshikoto (Otjikoto), Region / Namibia
brauner Jamesit auf kugeligem Goethit mit Duftit
Views (File:
1247426832
): 1604
brauner Jamesit auf kugeligem Goethit mit Duftit
Bildbreite: 3 mm; Fundort: Tsumeb Mine, Otjikoto Region, Namibia
Copyright: Joachim Esche; Contribution: Philip Blümner
Location: Namibia/Oshikoto (Otjikoto), Region/Tsumeb/Tsumeb Mine
Mineral: Goethite, Jamesite
Image: 1247426832
Rating: 6 (votes: 2)
License: Usage for Mineralienatlas project only
brauner Jamesit auf kugeligem Goethit mit Duftit

Bildbreite: 3 mm; Fundort: Tsumeb Mine, Otjikoto Region, Namibia

Copyright: Joachim Esche
Contribution: Philip Blümner 2009-07-12
Locality: Tsumeb Mine / Tsumeb / Oshikoto (Otjikoto), Region / Namibia
Jamesit
Views (File:
1327524103
): 732
Jamesit
Strahlig nadelige braune Kristalle, BB = 4,3 mm , Fundort: Tsumeb Mine, Otjikoto Region, Namibia.
Copyright: Joachim Esche; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A013344, Donator: Melanie Albert
Location: Namibia/Oshikoto (Otjikoto), Region/Tsumeb/Tsumeb Mine
Mineral: Jamesite
Image: 1327524103
Rating: 6 (votes: 1)
License: Usage for Mineralienatlas project only
Jamesit (SNr: A013344)

Strahlig nadelige braune Kristalle, BB = 4,3 mm , Fundort: Tsumeb Mine, Otjikoto Region, Namibia.

Collection: Lithothek der Münchener Micromounter
Copyright: Joachim Esche
Contribution: Münchener Micromounter 2012-01-25
Locality: Tsumeb Mine / Tsumeb / Oshikoto (Otjikoto), Region / Namibia
Jamesit
Views (File:
1352653670
): 666
Jamesit
Nadelige goldbraune Kristallbüschel, BB = 3 mm , Fundort: Tsumeb Mine, Otjikoto Region, Namibia.
Copyright: Joachim Esche; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A013343, Donator: Albert Melanie
Location: Namibia/Oshikoto (Otjikoto), Region/Tsumeb/Tsumeb Mine
Mineral: Jamesite
Image: 1352653670
License: Usage for Mineralienatlas project only
Jamesit (SNr: A013343)

Nadelige goldbraune Kristallbüschel, BB = 3 mm , Fundort: Tsumeb Mine, Otjikoto Region, Namibia.

Collection: Lithothek der Münchener Micromounter
Copyright: Joachim Esche
Contribution: Münchener Micromounter 2012-11-11
Locality: Tsumeb Mine / Tsumeb / Oshikoto (Otjikoto), Region / Namibia

You find additional specimen at the Geolitho Museum

Collectors Summary

Color rötlichbraun
Streak color blassbraun
Lustre Subdiamantglanz
Hardness (Mohs) 3
Solubility ++ heiße HNO3 oder HCl
Crystal System triklin, P1

Chemism

Chemical formula

Pb2ZnFe3+2(Fe3+,Zn)4(AsO4)4(OH)8(OH,O)2

Empirical formula (analysis)

Pb2ZnFe3+2(Fe3+2.8Zn1.2)(AsO4)4(OH)8[(OH)1.2O0.8]

Chemical composition

Arsen, Blei, Eisen, Zink, Sauerstoff, Wasserstoff

Unit weight: 1551.3223404 u; Number of atoms in the formula: 48.2

Info

Empirical formula:

Pb2ZnFe2(Fe2.8Zn1.2)(AsO4)4(OH)8[(OH)1.2O0.8]

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.60

9.2

19.09

1.0079470

9.2731124

Oxygen

O

26.81

26

53.94

15.9994300

415.9851800

Iron

Fe

17.28

4.8

9.96

55.8452000

268.0569600

Zinc

Zn

9.28

2.2

4.56

65.4094000

143.9006800

Arsenic

As

19.32

4

8.30

74.9216020

299.6864080

Lead

Pb

26.71

2

4.15

207.2100000

414.4200000

Strunz 9th edition incl. updates

8.BK.25

8: Phosphate, Arsenate, Vanadate
B: Phosphate, etc., mit weitere Anionen, ohne H2O
K: Mit mittelgroßen und großen [Kationen] (OH, etc.):RO4 = 2:1, 2.5:1
25:Jamesit-Gruppe

Lapis Classification

VII/B.24-070

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
B: Wasserfreie Phosphate, mit fremden Anionen F,Cl,O,OH
24: Mittelgroße und große Kationen: Mg-Cu-Zn und Ca-Na-K-Ba-Pb; Brackebuschit- Gruppe

Classification by Hölzel

8.BM.180

8: PHOSPHATES ARSENATES VANADATES
B: Phosphates (+Anions -Water)
M: Phosphates, very large: 2, Vmed: 2,3
1: very large: 2, Vmed: 2+3 Kulanite-Group

Hey's Chemical Index of Minerals

20.05.15

20: Arsenates (also arsenates with phosphate, but without other anions)
05: Arsenates of Ti and Pb

Dana 8th edition

41.11.02.01

41: Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
11: Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen with miscellaneous formulae

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

rötlichbraun

Streak color

blassbraun

Diaphaneity (Transparency)

transparent

Lustre

Subdiamantglanz

max. Birefringence

0.060

Birefringence chart\! Jamesite title=Birefringence chart Jamesite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.960

RI value β

1.995

RI value γ / ε

2.020

Ri mean

1.992

2V angle

Biaxial (-) 75°

Orientation

Y ^ a ≃ 5° auf (001); Y ^ a = 15° auf (010)

Dispersion

r > v

Absorption

Z > X = Y

Pleochroism

Stark, X = Y = hellbraun, Z = tief rotbraun

Crystallography

Crystal System

triklin

Class (H-M)

1

Space Group number

2

Space Group

P1

Cell parameters a (Å)

5.583

Cell parameters b (Å)

9.542

Cell parameters c (Å)

10.219

Cell parameters a/b or c/a

0.585

Cell parameters c/b

1.071

Cell parameters α

109.82

Cell parameters β

90.57

Cell parameters γ

97.72

Z

1

Volume (ų)

506.606

X-Ray Powder Diffraction

9.67(80),
4.70(80),
3.40(100),
3.26(80),
3.04(90),
2.92(60),
2.04(60),
1.588(60)

XRD chart Jamesite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

3

VHN (Hardness Vickers)

83 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

5.084 (berechnet)

5.085 ( ρ calc. Mineralienatlas )

Instability

++ heiße HNO3 oder HCl

(Co-)Type locality

(Co-)Type locality

Namibia/Oshikoto (Otjikoto), Region/Tsumeb/Tsumeb Mine

Type material

Archiv der Universität Stuttgart, "Mineralogische Sammlung Prof. Keller"

Collection number of type material

TM-78.79-8910.20 / 0/824-s27/2

Paragenesis of type material

Duftit, Tsumcorit, Goethit, Dolomit

Preface

Name from

Der Name ehrt Christopher James, einer der ersten Bergbau-Ingenieure an der Tsumeb Mine, Namibia.

Author (Name, Year)

Keller & Hess & Dunn, 1981

References

Chemie der Erde 40 (1981), 105

Cooper, M. A. & Hawthorne, F. C. - Local Pb2+-◻ disorder in the crystal structure of jamesite, Pb2ZnFe3+2(Fe3+2.8Zn1.2)(AsO4)4(OH)8[(OH)1.2O0.8], and revision of the chemical formula. Canadian Mineralogist 37 (1999), 53-60.

Other languages

German

Jamesit

Spanish

Jamesita

French

Jamesite

English

Jamesite

Russian

Джеймсит

Russian

Джемесит

CNMNC (IMA)-Number

IMA 1978-079

CNMNC symbol

Symbol

Jms

Locations with GPS information

IDs

GUSID (Global unique identifier short form) 080Yw84kZUCePEN_vhOGxw
GUID (Global unique identifier) C318CDD3-24CE-4065-9E3C-437FBE1386C7
Database ID 1770