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Ephesite

Pictures (4 Images total)

Rosafarbene Ephesit-Kristalle
Views (File:
1082237310
): 2030
Rosafarbene Ephesit-Kristalle
bis 1 mm auf Kluftzonen; Fundort: Mancorp Mine, Gamagara Rigde, Postmasburg, Griqualand-West Northern Cap, Südafrika
Copyright: McSchuerf; Contribution: Mineralienatlas
Location: Südafrika/Nordkap (Northern Cape), Provinz/Mgcawu, Distrikt/Postmasburg/Postmasburg Manganese Field/Gloucester Farm/Gamagara Ridge
Mineral: Ephesite
Image: 1082237310
Rating: 7.33 (votes: 3)
License: Usage for Mineralienatlas project only
Rosafarbene Ephesit-Kristalle

bis 1 mm auf Kluftzonen; Fundort: Mancorp Mine, Gamagara Rigde, Postmasburg, Griqualand-West Northern Cap, Südafrika

Copyright: McSchuerf
Contribution: Mineralienatlas 2004-04-17
Locality: Gamagara Ridge / Gloucester Farm / Postmasburg Manganese Field / Postmasburg / Mgcawu, Distrikt / Nordkap (Northern Cape), Provinz / Südafrika
Ephesit
Views (File:
1311714116
): 1307
Ephesit
Größe: 33x32x32 mm; Fundort: Wessels Mine, Hotazel, Kalahari Manganfelder, Provinz Nordkap, Südafrika
Copyright: Rob Lavinsky; Contribution: slugslayer
Location: Südafrika/Nordkap (Northern Cape), Provinz/Kalahari Manganese Field/Hotazel/Wessel's Mine (Wessels Mine)
Mineral: Ephesite
Image: 1311714116
Rating: 4 (votes: 1)
License: Usage for Mineralienatlas project only
Ephesit

Größe: 33x32x32 mm; Fundort: Wessels Mine, Hotazel, Kalahari Manganfelder, Provinz Nordkap, Südafrika
Copyright: Rob Lavinsky
Contribution: slugslayer 2011-07-26
Locality: Wessel's Mine (Wessels Mine) / Hotazel / Kalahari Manganese Field / Nordkap (Northern Cape), Provinz / Südafrika
Ephesit
Views (File:
1487846466
): 739
Ephesit
Pseudohexagonaler Kristall; in einer Matrix aus Alabandin; Postmasburg,Südafrika; BB: 4 mm
Copyright: Rockhounder; Contribution: Rockhounder
Collection: Rockhounder
Location: Südafrika/Nordkap (Northern Cape), Provinz/Mgcawu, Distrikt/Postmasburg/Postmasburg Manganese Field/Gloucester Farm/Gamagara Ridge
Mineral: Ephesite
Image: 1487846466
License: Usage for Mineralienatlas project only
Ephesit

Pseudohexagonaler Kristall; in einer Matrix aus Alabandin; Postmasburg,Südafrika; BB: 4 mm
Collection: Rockhounder
Copyright: Rockhounder
Contribution: Rockhounder 2017-02-23
Locality: Gamagara Ridge / Gloucester Farm / Postmasburg Manganese Field / Postmasburg / Mgcawu, Distrikt / Nordkap (Northern Cape), Provinz / Südafrika
Ephesit
Views (File:
1661801834
): 53
Ephesit
Tafelige und Dipyramidale rötliche Ephesite auf Matrix, aus Postmasburg/ Südafrika; Ex J. Muizebelt, 1991 erworben; BB: 4cm
Copyright: smaragd123; Contribution: smaragd123
Collection: smaragd123
Location: Südafrika/Nordkap (Northern Cape), Provinz/Mgcawu, Distrikt/Postmasburg/Postmasburg Manganese Field/Gloucester Farm/Gamagara Ridge
Mineral: Ephesite
Image: 1661801834
License: Usage for Mineralienatlas project only
Ephesit

Tafelige und Dipyramidale rötliche Ephesite auf Matrix, aus Postmasburg/ Südafrika; Ex J. Muizebelt, 1991 erworben; BB: 4cm
Collection: smaragd123
Copyright: smaragd123
Contribution: smaragd123 2022-08-29
Locality: Gamagara Ridge / Gloucester Farm / Postmasburg Manganese Field / Postmasburg / Mgcawu, Distrikt / Nordkap (Northern Cape), Provinz / Südafrika

Collectors Summary

Color bräunlich rosa, perlgrau, blass grün
Streak color weiß
Hardness (Mohs) 3.5 - 4.5
Solubility ++ H2SO4, + HF, +- kochende konz. HCl
Crystal System monoklin, Cc

Chemism

Chemical formula

NaLiAl2(Al2Si2)O10(OH)2

Additional chem. information

2M1 Polytyp von Ephesit

Chemical composition

Aluminium, Lithium, Natrium, Silicium, Sauerstoff, Wasserstoff

Unit weight: 388.037237 u; Number of atoms in the formula: 22

Info

Empirical formula:

NaLiAl2(Al2Si2)O10(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.52

2

9.09

1.0079470

2.0158940
Lithium

Li

1.79

1

4.55

6.9412000

6.9412000
Oxygen

O

49.48

12

54.55

15.9994300

191.9931600
Sodium

Na

5.92

1

4.55

22.9897702

22.9897702
Aluminium

Al

27.81

4

18.18

26.9815382

107.9261528
Silicon

Si

14.48

2

9.09

28.0855300

56.1710600

Analysis wt%

SiO2 : 30.86, Al2O3 : 51.68, Fe2O3 : 0.47, Na2O : 7.94, Li2O : 3.80, H2O : 4.98 (Ref: American Mineralogist 67)

Strunz 9th edition incl. updates

9.EC.20

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

Lapis Classification

VIII/H.11-130

VIII: SILIKATE
H: Schichtsilikate
11: Glimmerartige Schicht-silikate mit Baugruppen [Si4O10] 4- und verwandte Strukturen; Glimmer-Gruppe; Lithionit/Biotit-Reihe

Classification by Hölzel

9.EE.220

9: SILICATES
E: Phyllosilicates
E: ~[(OH)2|Al2Si2O10] Margarite-Group

Hey's Chemical Index of Minerals

16.02.08

16: Silicates Containing Aluminum and other Metals
02: Aluminosilicates of Na

Dana 8th edition

71.02.02b.16

71: Phyllosilicate Minerals
02: Phyllosilicates Phyllosilicate Sheets of Six-Membered Rings with 2:1 Layers
02b: Mica Group (Biotite subgroup)

IMA Classification

IMA Classification

 Mica group  ⇒ True micas

Optical Properties

Color

bräunlich rosa, perlgrau, blass grün

Streak color

weiß

Diaphaneity (Transparency)

durchscheinend

max. Birefringence

0.032
Birefringence chart\! Ephesite title=Birefringence chart Ephesite

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

1.595

RI value β

1.625

RI value γ / ε

1.627

Ri mean

1.616

2V angle

Biaxial (-) 28°

Crystallography

Crystal System

monoklin

Class (H-M)

m

Space Group number

9

Space Group

Cc

Cell parameters a (Å)

5.123

Cell parameters b (Å)

8.872

Cell parameters c (Å)

19.307

Cell parameters a/b or c/a

0.577

Cell parameters c/b

2.176

Cell parameters α

89.97

Cell parameters β

95.12

Cell parameters γ

89.97

Z

4

Volumne (ų)

874.026

X-Ray Powder Diffraction

9.61(80),
4.38(70),
3.258(40),
3.203(100),
3.138(40),
2.523(90),
1.479(70),
1.473(50)
XRD chart Ephesite

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)

3.5 - 4.5

VHN (Hardness Vickers)

190 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.984

2.949 ( ρ calc. Mineralienatlas )

Radioactivity

keine bekannt

Instability

++ H2SO4, + HF, +- kochende konz. HCl

(Co-)Type locality

(Co-)Type locality

Türkei/Ägäisregion/Izmir, Provinz/Ephesus/Gumuch-dagh

Preface

Author (Name, Year)

Smith, 1851

References

American Mineralogist 52 (1967), 1689.

Contributions to Mineralogy and Petrology 85 (1984), 74.

Neues Jahrbuch für Mineralogie, Monatshefte (1985), 337.

Neues Jahrbuch für Mineralogie, Monatshefte (1987), 275-287.

Canadian Mineralogist 36 (1998), 905.

IMA group assignments

Other languages

German

Ephesit

English

Ephesite

Russian

Эфесит

Alternative Name

Ephesita

Natronmargarit

Natronmargarita

Natronmargarite

Soda-Margarite

CNMNC symbol

Symbol

Eph

Locations with GPS information