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Mathewrogersite

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Mathewrogersit
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Mathewrogersit
farblose Kristalle von Mathewrogersit, Tsumeb Mine, Otavi-Bergland, Namibia; BB < 1 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Namibia/Oshikoto (Otjikoto), Region/Tsumeb/Tsumeb Mine
Mineral: Mathewrogersite
Image: 1589915850
License: Usage for Mineralienatlas project only
Mathewrogersit

farblose Kristalle von Mathewrogersit, Tsumeb Mine, Otavi-Bergland, Namibia; BB < 1 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-05-19
Locality: Tsumeb Mine / Tsumeb / Oshikoto (Otjikoto), Region / Namibia

Collectors Summary

Color farblos, weiß, hellgrün gelb
Streak color weiß
Hardness (Mohs) 2
Solubility +++ HNO3
Crystal System hexagonal,

Chemism

Chemical formula

Pb7(Fe,Cu)Al3GeSi12O36·(OH,H2O)6

Chemical composition

Aluminium, Blei, Eisen, Germanium, Kupfer, Silicium, Sauerstoff, Wasserstoff

Unit weight: 2678.3881121 u; Number of atoms in the formula: 73.5

Info

Empirical formula:

Pb7(Fe0.75Cu0.25)Al3GeSi12O36·((OH)0.75(H2O)0.25)6

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.28

7.5

10.20

1.0079470

7.5596025
Oxygen

O

25.09

42

57.14

15.9994300

671.9760600
Aluminium

Al

3.02

3

4.08

26.9815382

80.9446146
Silicon

Si

12.58

12

16.33

28.0855300

337.0263600
Iron

Fe

1.56

0.75

1.02

55.8452000

41.8839000
Copper

Cu

0.59

0.25

0.34

63.5463000

15.8865750
Germanium

Ge

2.71

1

1.36

72.6410000

72.6410000
Lead

Pb

54.15

7

9.52

207.2100000

1,450.4700000

Analysis wt%

PbO : 57.70, FeO : 1.70, CuO : 0.80, Al2O3 : 5.90, GeO2 : 3.90, SiO2 : 26.20, H2O : 1.90 (Ref: Neues Jahrbuch für Mineralogie, (Monatshefte) 86)

Strunz 9th edition incl. updates

9.CJ.55

9: Silikate (Germanate)
C: Ringsilikate (Cyclosilikate)
J: ~[Si6O18]12- sechser-Einfachringe, ohne inselartig, komplexe [Anionen]
55:Mathewrogersit-Gruppe

Lapis Classification

VIII/E.02-040

VIII: SILIKATE
E: Ringsilikate
2: Dreierringe [Si3O9] 6-

Classification by Hölzel

9.ES.320

9: SILICATES
E: Phyllosilicates
S: Phyllosilicates with tetrahedral Doublelayers

Dana 8th edition

78.03.01.01

78: Unclassified Silicate Minerals
03: Unclassified silicates possible cyclosilicates

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos, weiß, hellgrün gelb

Streak color

weiß

Diaphaneity (Transparency)

durchscheinend

max. Birefringence

0.065
Birefringence chart\! Mathewrogersite title=Birefringence chart Mathewrogersite

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

1.810

RI value γ / ε

1.745

Ri mean

1.788

2V angle

Uniaxial (-)

Crystallography

Crystal System

hexagonal

Cell parameters a (Å)

8.457

Cell parameters b (Å)

-

Cell parameters c (Å)

45.970

Cell parameters a/b or c/a

5.436

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

3

Volume (ų)

2847.33

X-Ray Powder Diffraction

15.30(70),
7.68(60),
4.08(50),
3.257(100),
2.860(50),
2.766(60),
2.030(70),
1.762(60)
XRD chart Mathewrogersite

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

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

2

VHN (Hardness Vickers)

32 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.7

4.686 ( ρ calc. Mineralienatlas )

Instability

+++ HNO3

(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-84.42-TL-8904.01 / 0/824-s27/2

Paragenesis of type material

Chalkosin, Quarz, Anglesit, Leadhillit, Kegelit, Schaurteit, Alamosit, Queitit, Melanotekit, Willemit, Larsenit, Mimetesit

Preface

Author (Name, Year)

Keller & Dunn, 1986

References

Neues Jahrbuch für Mineralogie, Monatshefte (1986), 203

Other languages

German

Mathewrogersit

Spanish

Mathewrogersita

English

Mathewrogersite

French

Mathewrogersite

CNMNC (IMA)-Number

IMA 1984-042

CNMNC symbol

Symbol

Mwg

Locations with GPS information

IDs

GUSID (Global unique identifier short form) PHNyIpMPP0GHloLXEl7aVg
GUID (Global unique identifier) 2272733C-0F93-413F-8796-82D7125EDA56
Database ID 2407