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Itoite

Collectors Summary

Color seidenweiß
Streak color weiß
Crystal System orthorhombisch, Pnma

Chemism

Chemical formula

Pb3GeO2(SO4)2(OH)2

Chemical composition

Blei, Germanium, Sauerstoff, Schwefel, Wasserstoff

Unit weight: 952.411054 u; Number of atoms in the formula: 20

Info

Empirical formula:

Pb3GeO2(SO4)2(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.21

2

10.00

1.0079470

2.0158940

Oxygen

O

20.16

12

60.00

15.9994300

191.9931600

Sulfur

S

6.73

2

10.00

32.0655000

64.1310000

Germanium

Ge

7.63

1

5.00

72.6410000

72.6410000

Lead

Pb

65.27

3

15.00

207.2100000

621.6300000

Analysis wt%

PbO : 69.15, GeO2 : 12.45, SO3 : 16.54, H2O : 1.86 (Ref: berechnet)

Strunz 9th edition incl. updates

7.BD.50

7: Sulfate (Selenate, Tellurate, Chromate, Molybdate, Wolframate)
B: Sulfate (Selenate, etc.) mit weitere Anionen, ohne H2O
D: Mit ausschließlich großen [Kationen]
50:Itoit-Gruppe

Lapis Classification

VI/B.09-010

VI: SULFATE, CHROMATE, MOLYBDATE UND WOLFRAMATE
B: Wasserfreie Sulfate, mit fremden Anionen
9: Mittelgroße Kationen vorwiegend

Classification by Hölzel

7.DM.200

7: SULFATES CHROMATES MOLYBDATES WOLFRAMATES
D: Sulfates (+Anions +Water)
M: Fleischerite-Group

Dana 8th edition

30.02.06.01

30: Anhydrous Sulfates Containing Hydroxyl or Halogen
02: Anhydrous Sulfates Containing Hydroxyl or Halogen where (A B)2 XO4 Zq

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

seidenweiß

Streak color

weiß

RI value α / ω / n

1.845

Ri mean

1.845

2V angle

Biaxial

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

62

Space Group

Pnma

Cell parameters a (Å)

8.47

Cell parameters b (Å)

5.38

Cell parameters c (Å)

6.94

Cell parameters a/b or c/a

1.574

Cell parameters c/b

1.290

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

1

Volume (ų)

316.246

X-Ray Powder Diffraction

4.24(80),
3.794(60),
3.604(60),
3.326(90),
3.209(70),
3.003(90),
2.065(100),
2.027(80)

XRD chart Itoite

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

Crystals 3D

Open larger view

Physical Properties

Density (g/cm³)

6.67 (berechnet)

5.001 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

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

Type material

Mineralogische Sammlungen Technische Universität Berlin

Collection number of type material

57/1405 / 23-3

Paragenesis of type material

Fleischerit, Plumbojarosit, Mimetesit

Preface

Associations

Fleischerit, Mimetesit, Cerussit, Anglesit, Plumbojarosit, Tennantit, Dolomit

Author (Name, Year)

Frondel & Strunz, 1960

References

Neues Jahrbuch für Mineralogie, Monatshefte (1960), 132

Other languages

German

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French

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English

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Spanish

Itoíta

Russian

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CNMNC symbol

Symbol

It

Locations with GPS information

IDs

GUSID (Global unique identifier short form) xval06WqJUO2nRKRvUdcdg
GUID (Global unique identifier) D3A5F6C6-AAA5-4325-B69D-1291BD475C76
Database ID 1750