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Changoite

Pictures (2 Images total)

Changoit
Views (File:
1351535122
): 1582
Changoit
Deblin-Mine Namibia; Foto: Mineralientage München 2012;
Copyright: Stefan; Contribution: Stefan
Collection: giantcrystal
Location: Namibia/Erongo, Region/Swakopmund, Kreis/Arandis/Rössingberge/Namib Lead Mine (Deblin Mine)
Mineral: Changoite
Image: 1351535122
Rating: 8.5 (votes: 2)
License: Usage for Mineralienatlas project only
Changoit

Deblin-Mine Namibia; Foto: Mineralientage München 2012;
Collection: giantcrystal
Copyright: Stefan
Contribution: Stefan 2012-10-29
Locality: Namib Lead Mine (Deblin Mine) / Rössingberge / Arandis / Swakopmund, Kreis / Erongo, Region / Namibia
Changoit
Views (File:
1351538213
): 851
Changoit
Namib Lead Mine, Namibia; Mineralientage München 2012, Braith-Stones
Copyright: Stefan; Contribution: Stefan
Collection: anatasi
Location: Namibia/Erongo, Region/Swakopmund, Kreis/Arandis/Rössingberge/Namib Lead Mine (Deblin Mine)
Mineral: Changoite
Image: 1351538213
License: Usage for Mineralienatlas project only
Changoit

Namib Lead Mine, Namibia; Mineralientage München 2012, Braith-Stones
Collection: anatasi
Copyright: Stefan
Contribution: Stefan 2012-10-29
Locality: Namib Lead Mine (Deblin Mine) / Rössingberge / Arandis / Swakopmund, Kreis / Erongo, Region / Namibia

Collectors Summary

Color farblos
Streak color weiß
Hardness (Mohs) 2.50 - 3.00
Solubility +++ H2O
Crystal System monoklin, P21/a

Chemism

Chemical formula

Na2Zn[SO4]2·4H2O

Chemical composition

Natrium, Zink, Sauerstoff, Schwefel, Wasserstoff

Unit weight: 375.5766764 u; Number of atoms in the formula: 25

Info

Empirical formula:

Na2Zn[SO4]2·4H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

2.15

8

32.00

1.0079470

8.0635760
Oxygen

O

51.12

12

48.00

15.9994300

191.9931600
Sodium

Na

12.24

2

8.00

22.9897702

45.9795404
Sulfur

S

17.08

2

8.00

32.0655000

64.1310000
Zinc

Zn

17.42

1

4.00

65.4094000

65.4094000

Analysis wt%

Na2O : 16.51, ZnO : 21.67, SO3 : 42.64, H2O : 19.19 (Ref: berechnet)

Strunz 9th edition incl. updates

7.CC.50

7: Sulfate (Selenate, Tellurate, Chromate, Molybdate, Wolframate)
C: Sulfate (Selenate, etc.) ohne weitere Anionen, mit H2O
C: Mit mittelgroßen und großen [Kationen]
50:Blödit-Gruppe

Lapis Classification

VI/C.18-025

VI: SULFATE, CHROMATE, MOLYBDATE UND WOLFRAMATE
C: Wasserhaltige Sulfate, ohne fremde Anionen
18: Mittelgroße und sehr große Kationen

Classification by Hölzel

7.CD.730

7: SULFATES CHROMATES MOLYBDATES WOLFRAMATES
C: Sulfates (-Anions +Water)
D: Sulfates, C medium + large
7: Kröhnkite-Group

Dana 8th edition

29.03.03.05

29: Hydrated Acid and Sulfates
03: Hydrated Acid and Sulfates where (A+)2 B (XO4)2 · x(H2O)
03: Blodite Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos

Streak color

weiß

max. Birefringence

0.009
Birefringence chart\! Changoite title=Birefringence chart Changoite

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

1.507

RI value β

1.512

RI value γ / ε

1.516

Ri mean

1.512

2V angle

Biaxial (-) 85°

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/a

Cell parameters a (Å)

11.077

Cell parameters b (Å)

8.249

Cell parameters c (Å)

5.532

Cell parameters a/b or c/a

1.343

Cell parameters c/b

0.671

Cell parameters α

90°

Cell parameters β

100.18

Cell parameters γ

90°

Z

2

Volumne (ų)

497.524

X-Ray Powder Diffraction

4.550(60),
4.245(30),
3.325(20),
3.289(100),
3.262(30),
3.245(20),
2.695(20),
2.631(30)
XRD chart Changoite

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)

2.50 - 3.00

VHN (Hardness Vickers)

68 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.5 (gemessen) 2.51 (berechnet)

2.507 ( ρ calc. Mineralienatlas )

Instability

+++ H2O

(Co-)Type locality

(Co-)Type locality

Chile/Antofagasta, Region (II. Region)/Antofagasta, Provinz/Sierra Gorda

Type material

Mineralogisches Museum der Universität Hamburg

Collection number of type material

MMHH C1/97 / Tresor des Museums

Paragenesis of type material

Thenardit, Gips

Preface

Author (Name, Year)

Schlüter & Klaska & Gebhard, 1999

References

Neues Jahrbuch für Mineralogie, Monatshefte (1999), 97

Other languages

German

Changoit

French

Changoite

English

Changoite

Spanish

Changoíta

Russian

Чангоит

Alternative Name

Zincblödite

CNMNC (IMA)-Number

IMA 1997-041

CNMNC symbol

Symbol

Cgo

Locations with GPS information