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Swinefordite

Pictures (2 Images total)

Swinefordit
Views (File:
1700755579
): 45
Swinefordit
hauchdünne, folienartige Glimmerplättchen auf Quarz vom Kentiche Pegmatitfeld/Äthiopien; analysiertes Material von Michail Murashko; Bildbreite 4,15 mm
Copyright: Haubi; Contribution: Haubi
Collection: Haubi
Location: Äthiopien/Oromiyaa (Oromia), Region/Kenticha Pegmatit-Feld
Mineral: Swinefordite
Image: 1700755579
License: Usage for Mineralienatlas project only
Swinefordit

hauchdünne, folienartige Glimmerplättchen auf Quarz vom Kentiche Pegmatitfeld/Äthiopien; analysiertes Material von Michail Murashko; Bildbreite 4,15 mm

Collection: Haubi
Copyright: Haubi
Contribution: Haubi 2023-11-23
Locality: Kenticha Pegmatit-Feld / Oromiyaa (Oromia), Region / Äthiopien
Swinefordit
Views (File:
1703365965
): 23
Swinefordit
Olivgelbe Swinefordit-Plättchen (ohne Maßstab) von der Typlokalität Foote Mine, Cleveland Co., North Carolina, USA. Ex Van den Broucke Sammlung (sh.: https://www.mindat.org/mesg-560223.html).
Copyright: Wikipedia-user: David Hospital; Contribution: oliverOliver
Location: USA/North Carolina/Cleveland Co./Kings Mountain District/Foote Mine (Foote Lithium Co. Mine)
Mineral: Swinefordite
Image: 1703365965
License: Creative Commons - Attribution-ShareAlike 4.0 International  (CC BY-SA) V.4.0
Swinefordit

Olivgelbe Swinefordit-Plättchen (ohne Maßstab) von der Typlokalität Foote Mine, Cleveland Co., North Carolina, USA. Ex Van den Broucke Sammlung (sh.: https://www.mindat.org/mesg-560223.html).

Copyright: Wikipedia-user: David Hospital
Contribution: oliverOliver 2023-12-23
Locality: Foote Mine (Foote Lithium Co. Mine) / Kings Mountain District / Cleveland Co. / North Carolina / USA

Collectors Summary

Color grünlich grau, hellolivgrün
Streak color weiß
Hardness (Mohs) 1
Solubility +++ dispergiert in H2O
Crystal System hexagonal,

Chemism

Chemical formula

(Ca,Na)0.3(Al,Li,Mg)2(Si,Al)4O10(OH,F)2·2H2O

Chemical composition

Aluminium, Calcium, Lithium, Magnesium, Natrium, Silicium, Fluor, Sauerstoff, Wasserstoff

Unit weight: 394.41879393 u; Number of atoms in the formula: 25.8

Info

Empirical formula:

(Ca0.75Na0.25)0.3(Al0.6Li0.3Mg0.1)2(Si0.75Al0.25)4O10((OH)0.75F0.25)2·2H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

1.41

5.5

21.32

1.0079470

5.5437085

Lithium

Li

1.06

0.6

2.33

6.9412000

4.1647200

Oxygen

O

54.76

13.5

52.33

15.9994300

215.9923050

Fluorine

F

2.41

0.5

1.94

18.9984033

9.4992016

Sodium

Na

0.44

0.08

0.29

22.9897702

1.7242328

Magnesium

Mg

1.23

0.2

0.78

24.3050600

4.8610120

Aluminium

Al

15.05

2.2

8.53

26.9815382

59.3593840

Silicon

Si

21.36

3

11.63

28.0855300

84.2565900

Calcium

Ca

2.29

0.23

0.87

40.0784000

9.0176400

Analysis wt%

SiO2 : 59.46, Al2O3 : 14.68, Fe2O3 : 1.79, MgO : 7.38, CaO : 1.71, Li2O : 4.58, H2O : 9.94 (Ref: American Mineralogist 75)

Strunz 9th edition incl. updates

9.EC.40

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

Lapis Classification

VIII/H.19-060

VIII: SILIKATE
H: Schichtsilikate
19: Tonminerale, regulär geschichtet; Glimmerartige Schicht-silikate mit Baugruppen [Si4O10] 4- und verwandte Strukturen; Montmorillonit-Gruppe

Classification by Hölzel

9.EI.130

9: SILICATES
E: Phyllosilicates
I: Montmorillonite-Saponite-Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

grünlich grau, hellolivgrün

Streak color

weiß

Diaphaneity (Transparency)

durchscheinend bis opak

max. Birefringence

0.034

Birefringence chart\! Swinefordite title=Birefringence chart Swinefordite

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

1.492

RI value β

1.524

RI value γ / ε

1.526

Ri mean

1.514

2V angle

Biaxial (-) 37°

Crystallography

Crystal System

hexagonal

Cell parameters a (Å)

5.205

Cell parameters b (Å)

-

Cell parameters c (Å)

12.65

Cell parameters a/b or c/a

2.430

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

1

Volume (ų)

296.799

X-Ray Powder Diffraction

12.96(100),
6.27(20),
4.53(80),
3.09(70),
2.62(50),
1.713(50),
1.508(80),
1.304(50)

XRD chart Swinefordite

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

Physical Properties

Hardness (Mohs)

1

Density (g/cm³)

2.3 - 2.8 / Durchschnittlich = 2.54

2.207 ( ρ calc. Mineralienatlas )

Instability

+++ dispergiert in H2O

Preface

Author (Name, Year)

Tien & Leavens & Nelen, 1975

References

American Mineralogist 60 (1975), 540

Other languages

German

Swinefordit

Spanish

Swinefordita

English

Swinefordite

French

Swinefordite

Russian

Свайнфордит

https://catalogmineralov.ru/mineral/swinefordite.html

CNMNC (IMA)-Number

IMA 1973-054

CNMNC symbol

Symbol

Sfd

Locations with GPS information

IDs

GUSID (Global unique identifier short form) WYDBBgMZW0OghfIK9c4-oA
GUID (Global unique identifier) 06C18059-1903-435B-A085-F20AF5CE3EA0
Database ID 3715