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Yoderite (Yoderit)

Pictures (3 Images total)

Yoderit
Views (File:
1248867830
): 1567
Yoderit
Bildbreite: 3 mm; Fundort: Mautia, Kongwa, Region Dodoma, Tansania
Copyright: Maurice de Graaf; Contribution: Philip Blümner
Location: Tansania/Dodoma, Region/Kongwa/Mautia
Mineral: Yoderite
Image: 1248867830
License: Usage for Mineralienatlas project only
Yoderit

Bildbreite: 3 mm; Fundort: Mautia, Kongwa, Region Dodoma, Tansania
Copyright: Maurice de Graaf
Contribution: Philip Blümner 2009-07-29
Locality: Mautia / Kongwa / Dodoma, Region / Tansania
Yoderit
Views (File:
1264186188
): 1409
Yoderit
Größe: 60x60 mm; Fundort: Mautia, Kongwa, Region Dodoma, Tansania
Copyright: Paul Bongaerts; Contribution: Philip Blümner
Location: Tansania/Dodoma, Region/Kongwa/Mautia
Mineral: Yoderite
Image: 1264186188
License: Usage for Mineralienatlas project only
Yoderit

Größe: 60x60 mm; Fundort: Mautia, Kongwa, Region Dodoma, Tansania
Copyright: Paul Bongaerts
Contribution: Philip Blümner 2010-01-22
Locality: Mautia / Kongwa / Dodoma, Region / Tansania
Yoderit
Views (File:
1711895762
): 65
Yoderit
Dunkle, eingewachsene Yoderitkristalle von Mautia in Tansania. Größe des Stückes etwa 46 mm x 33 mm.
Copyright: Klaus Schäfer; Contribution: Klaus Schäfer
Collection: Klaus Schäfer, Collection number: SyS-Yode-3-1-1
Location: Tansania/Dodoma, Region/Kongwa/Mautia
Mineral: Yoderite
Image: 1711895762
License: Usage for Mineralienatlas project only
Yoderit (SNr: SyS-Yode-3-1-1)

Dunkle, eingewachsene Yoderitkristalle von Mautia in Tansania. Größe des Stückes etwa 46 mm x 33 mm.
Collection: Klaus Schäfer
Copyright: Klaus Schäfer
Contribution: Klaus Schäfer 2024-03-31
Locality: Mautia / Kongwa / Dodoma, Region / Tansania

Collectors Summary

Color purpurrot, tiefblau, smaragdgrün, gelb
Streak color weiß
Hardness (Mohs) 6
Solubility +- Säuren
Crystal System monoklin, P21/m

Chemism

Chemical formula

(Mg,Al,Fe3+)8Si4(O,OH)20

Chemical composition

Aluminium, Eisen, Magnesium, Silicium, Sauerstoff, Wasserstoff

Unit weight: 663.46659468 u; Number of atoms in the formula: 37

Info

Empirical formula:

(Mg0.6Al0.3Fe0.1)8Si4(O0.75(OH)0.25)20

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.76

5

13.51

1.0079470

5.0397350
Oxygen

O

48.23

20

54.05

15.9994300

319.9886000
Magnesium

Mg

17.58

4.8

12.97

24.3050600

116.6642880
Aluminium

Al

9.76

2.4

6.49

26.9815382

64.7556917
Silicon

Si

16.93

4

10.81

28.0855300

112.3421200
Iron

Fe

6.73

0.8

2.16

55.8452000

44.6761600

Analysis wt%

SiO2 : 36.12, CaO : 1.48, MgO : 12.23, FeO : 4.82, Al2O3 : 41.06, Fe2O3 : 0.50, H2O : 3.25 (Ref: Mineralogical Magazine 59)

Strunz 9th edition incl. updates

9.AF.25

9: Silikate (Germanate)
A: Inselsilikate (Nesosilikate)
F: Insel(Neso)silikate mit zusätzlichem Anionen; Kationen in [4], [5] und/oder nur [6] Koordination
25:Yoderit-Gruppe

Lapis Classification

VIII/B.02-060

VIII: SILIKATE
B: Inselsilikate mit tetraederfremden Anionen
2: Kationen in tetraedrischer oder oktaedrischer Koordination [4/6]

Classification by Hölzel

9.AH.220

9: SILICATES
A: Nesosilicates
H: Nesosilicates with O + (OH, OH,X, X)
2: Unclassified

Dana 8th edition

52.02.02b.03

52: Nesosilicates Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
02: Nesosilicates Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O with cations in [4] and >[4] coordination
02b: AL2SIO5 Andalusite subgroup)

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

purpurrot, tiefblau, smaragdgrün, gelb

Streak color

weiß

Diaphaneity (Transparency)

transparent

max. Birefringence

0.026
Birefringence chart\! Yoderite title=Birefringence chart Yoderite

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

1.689

RI value β

1.691

RI value γ / ε

1.715

Ri mean

1.698

2V angle

Biaxial (+) 25°

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

11

Space Group

P21/m

Cell parameters a (Å)

8.10

Cell parameters b (Å)

5.78

Cell parameters c (Å)

7.28

Cell parameters a/b or c/a

1.401

Cell parameters c/b

1.260

Cell parameters α

90°

Cell parameters β

106°..

Cell parameters γ

90°

Z

1

Volume (ų)

327.632

X-Ray Powder Diffraction

3.50(100),
3.23(70),
3.19(70),
3.03(90),
2.91(70),
2.61(80),
2.58(70),
2.00(80)
XRD chart Yoderite

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)

6

VHN (Hardness Vickers)

730 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.39

3.362 ( ρ calc. Mineralienatlas )

Instability

+- Säuren

(Co-)Type locality

(Co-)Type locality

Tansania/Dodoma, Region/Kongwa/Mautia

Preface

Author (Name, Year)

McKie & Radford, 1959

Additional Information

Benannt nach Hatten Schuyler Yoder, Jr. (* 1921), Petrologe und Direktor des Geophysischen Labors im Carnegie Institution of Washington (USA).

References

Mineralogical Magazine 32 (1959), 282

Other languages

German

Yoderit

Spanish

Yoderita

English

Yoderite

French

Yoderite

Russian

Иодерит

Russian

Йодерит

CNMNC symbol

Symbol

Yod

Locations with GPS information

IDs

GUSID (Global unique identifier short form) MUdjAYEO_0eXhXtqXvA_Dw
GUID (Global unique identifier) 01634731-0E81-47FF-9785-7B6A5EF03F0F
Database ID 4236