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Swinefordite

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

Volumne (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

(Co-)Type locality

(Co-)Type locality

USA/North Carolina/Cleveland Co./Kings Mountain District/Foote Mine (Foote Lithium Co. Mine)

Preface

Author (Name, Year)

Tien & Leavens & Nelen, 1975

References

American Mineralogist 60 (1975), 540

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Saponite

(Ca,Na)0.3(Mg,Fe2+)3(Si,Al)4O10(OH)2·4H2O

9.EC.40

'Hectorite'

Na0.3(Mg,Li)3Si4O10(F,OH)2

9.EC.40

Beidellite

(Na,Ca0.5)0.3Al2(Si,Al)4O10(OH)2·4H2O

9.EC.40

Nontronite

Na0.3Fe23+(Si,Al)4O10(OH)2·4H2O

9.EC.40

Kurumsakite

(Zn,Ni,Cu)8Al8V2Si5O35·27H2O

9.EC.40

Swinefordite

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

9.EC.40

Volkonskoite

Ca0.3(Cr3+,Mg,Fe3+)2(Si,Al)4O10(OH)2·4H2O

9.EC.40

Yakhontovite

(Ca,Na,K)0.3(CuFe2+Mg)2Si4O10(OH)2·3H2O

9.EC.40

Montmorillonite

(Na,Ca)0.3(Al,Mg)2Si4O10(OH)2·nH2O

monoklin : 2/m : C2/m

9.EC.40

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Brinrobertsite

(Na,K,Ca)0.3(Al,Fe,Mg)4(Si,Al)8O20(OH)4·3.5H2O

VIII/H.19-010

Montmorillonite

(Na,Ca)0.3(Al,Mg)2Si4O10(OH)2·nH2O

monoklin : 2/m : C2/m

VIII/H.19-020

Beidellite

(Na,Ca0.5)0.3Al2(Si,Al)4O10(OH)2·4H2O

VIII/H.19-030

Nontronite

Na0.3Fe23+(Si,Al)4O10(OH)2·4H2O

VIII/H.19-040

Volkonskoite

Ca0.3(Cr3+,Mg,Fe3+)2(Si,Al)4O10(OH)2·4H2O

VIII/H.19-050

Swinefordite

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

VIII/H.19-060

Yakhontovite

(Ca,Na,K)0.3(CuFe2+Mg)2Si4O10(OH)2·3H2O

VIII/H.19-070

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Montmorillonite

(Na,Ca)0.3(Al,Mg)2Si4O10(OH)2·nH2O

monoklin : 2/m : C2/m

9.EI.100

'Hectorite'

Na0.3(Mg,Li)3Si4O10(F,OH)2

9.EI.120

Swinefordite

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

9.EI.130

Wonesite

(Na,K,☐)(Mg,Fe,Al)6(Si,Al)8O20(OH,F)4

triklin : 1 : C1

9.EI.160

Other languages

German

Swinefordit

Spanish

Swinefordita

English

Swinefordite

French

Swinefordite

IMA Number

IMA 1973-054

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

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English pages

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