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Ferroceladonite

Pictures (2 Images total)

Ferroseladonit auf Sazhinit
Views (File:
1588968813
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Ferroseladonit auf Sazhinit
grüne, taflige Kristalle von Ferroseladonit, Aris Steinbrüche, Windhoek Rural, Khomas, Namibia; BB < 1 mm
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Namibia/Khomas, Region/Windhoek-Land, Kreis/Aris/Aris-Steinbrüche (Ariskop Quarry; Railway Quarry)
Mineral: Ferroceladonite
Image: 1588968813
License: Usage for Mineralienatlas project only
Ferroseladonit auf Sazhinit

grüne, taflige Kristalle von Ferroseladonit, Aris Steinbrüche, Windhoek Rural, Khomas, Namibia; BB < 1 mm
Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-05-08
Locality: Aris-Steinbrüche (Ariskop Quarry; Railway Quarry) / Aris / Windhoek-Land, Kreis / Khomas, Region / Namibia
Ferroseladonit
Views (File:
1652983808
): 74
Ferroseladonit
Fundort: Windhoek, Windhoek District, Khomas Region, Namibia; Bildbreite 2,9mm
Copyright: Karl-Heinz M.; Contribution: khm
Collection: Eberhard Z.
Location: Namibia/Khomas, Region/Windhoek-Land, Kreis/Aris/Aris-Steinbrüche (Ariskop Quarry; Railway Quarry)
Mineral: Ferroceladonite
Image: 1652983808
License: Usage for Mineralienatlas project only
Ferroseladonit

Fundort: Windhoek, Windhoek District, Khomas Region, Namibia; Bildbreite 2,9mm
Collection: Eberhard Z.
Copyright: Karl-Heinz M.
Contribution: khm 2022-05-19
Locality: Aris-Steinbrüche (Ariskop Quarry; Railway Quarry) / Aris / Windhoek-Land, Kreis / Khomas, Region / Namibia

Collectors Summary

Hardness (Mohs) 2.25
Cleavages vollkommen {001}
Fracture erdig bei Aggregaten
Crystal System monoklin, C2/m

Chemism

Chemical formula

K(Fe2+,Mg)(Fe3+,Al)[(OH)2|Si4O10]

Chemical composition

Aluminium, Eisen, Magnesium, Silicium, Kalium, Sauerstoff, Wasserstoff

Unit weight: 442.03893355 u; Number of atoms in the formula: 21

Info

Empirical formula:

K(Fe0.75Mg0.25)(Fe0.75Al0.25)[(OH)2Si4O10]

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.46

2

9.52

1.0079470

2.0158940
Oxygen

O

43.43

12

57.14

15.9994300

191.9931600
Magnesium

Mg

1.37

0.25

1.19

24.3050600

6.0762650
Aluminium

Al

1.53

0.25

1.19

26.9815382

6.7453846
Silicon

Si

25.41

4

19.05

28.0855300

112.3421200
Potassium

K

8.84

1

4.76

39.0983100

39.0983100
Iron

Fe

18.95

1.5

7.14

55.8452000

83.7678000

Strunz 9th edition incl. updates

9.EC.15

9: Silikate (Germanate)
E: Schichtsilikate (Phyllosilikate)
C: Schichtsilikate (Phyllosilikate) mit Glimmer Tafeln, zusammengesetzt aus tetrahedralen oder octahedralen Netzen
15:Muskovit-Gruppe

Lapis Classification

VIII/H.10-040

VIII: SILIKATE
H: Schichtsilikate
10: Glimmerartige Schicht-silikate mit Baugruppen [Si4O10] 4- und verwandte Strukturen; Glimmer-Gruppe; Seladonit/Muskovit-Reihe (Phengite)

Classification by Hölzel

9.ED.330

9: SILICATES
E: Phyllosilicates
D: Biotite-Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Mica group  ⇒ True micas

Optical Properties

RI value α / ω / n

1.640

Ri mean

1.640

2V angle

Biaxial

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell parameters a (Å)

5.270

Cell parameters b (Å)

9.106

Cell parameters c (Å)

10.125

Cell parameters a/b or c/a

0.579

Cell parameters c/b

1.112

Cell parameters α

90°

Cell parameters β

100.27

Cell parameters γ

90°

Z

2

Volumne (ų)

478.1

X-Ray Powder Diffraction

10.0(40),
3.65(50),
3.358(90),
3.321(100),
3.090(60),
2.91(40),
2.671(50),
2.584(50)
XRD chart Ferroceladonite

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

Physical Properties

Hardness (Mohs)

2.25

VHN (Hardness Vickers)

42 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.045 (berechnet)

3.07 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen {001}

Fracture

erdig bei Aggregaten

Tenacity

nicht erwähnt

(Co-)Type locality

(Co-)Type locality

Neuseeland/South Island/Southland, Region/Hokonui Hills

Preface

Author (Name, Year)

Li Gejing & Peacor & Coombs & Kawachi, 1997

References

American Mineralogist 82 (1997), 503

IMA group assignments

Other languages

Spanish

Ferroceladonita

English

Ferroceladonite

French

Ferroceladonite

German

Ferroseladonit

Russian

Ферроселадонит

Japanese

鉄ｾﾗﾄﾞﾝ石

Alternative Name

German

Ferroceladonit

Japanese

鉄セラドン石

CNMNC (IMA)-Number

IMA 1995-018

CNMNC symbol

Symbol

Fcel

Locations with GPS information