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Stevensite

Pictures (4 Images total)

Stevensit psm. nach Pektolith
Views (Image: 1276450409): 1340
Stevensit psm. nach Pektolith

Größe: 52x30 mm; Fundort: Interstate 80 Roadcut, Paterson, Passaic Co., New Jersey, USA

Copyright: John Sobolewski
Contribution: slugslayer 2010-06-13
Locality: Interstate 80 Roadcut / Paterson / Passaic Co. / New Jersey / USA
Stevensit psm. nach Pektolith
Views (Image: 1276450105): 1189
Stevensit psm. nach Pektolith

Größe: 43x24 mm; Fundort: Fort Lee, Bergen Co., New Jersey, USA

Copyright: John Sobolewski
Contribution: slugslayer 2010-06-13
Locality: Fort Lee / Bergen Co. / New Jersey / USA
Stevensit psm. nach Pektolith
Views (Image: 1276450430): 1306
Stevensit psm. nach Pektolith

Größe: 53x40 mm; Fundort: Interstate 80 Roadcut, Paterson, Passaic Co., New Jersey, USA

Copyright: John Sobolewski
Contribution: slugslayer 2010-06-13
Locality: Interstate 80 Roadcut / Paterson / Passaic Co. / New Jersey / USA
Stevensit
Views (Image: 1283687798): 1336
Stevensit

Größe: 8,9 x 5,9 x 4,4 cm, Fundort: Långban, Filipstad, Värmland, Schweden

Copyright: Rob Lavinsky
Contribution: thdun5 2010-09-05
Locality: Långban Fe-Mn-(Ba-As-Pb-Sb) Lagerstätte / Långban, Distrikt / Filipstad, Gemeinde / Värmland, Provinz / Schweden

Collectors Summary

Color beige weiß, gelbbraun, rosa
Streak color weiß
Hardness (Mohs) 2.5
Solubility +++ HCl
Crystal System monoklin,

Chemism

Chem­ical formula

(Ca|2)0.3Mg3Si4O10(OH)2

Chem­ical com­po­si­tion

Calcium, Magnesium, Silicium, Sauerstoff, Wasserstoff

Unit weight: 403.313394 u; Number of atoms in the formula: 21.6

Info

Empirical formula:

(Ca2)0.3Mg3Si4O10(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.50

2

9.26

1.0079470

2.0158940

Oxygen

O

47.60

12

55.56

15.9994300

191.9931600

Magnesium

Mg

18.08

3

13.89

24.3050600

72.9151800

Silicon

Si

27.85

4

18.52

28.0855300

112.3421200

Calcium

Ca

5.96

0.6

2.78

40.0784000

24.0470400

Anal­y­sis wt%

SiO2 : 57.30, MgO : 27.47, CaO : 0.97, H2O : 13.86 (Ref: American Mineralogist 59)

Strunz 9th edi­tion incl. updates

9.EC.45

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

Lapis Clas­sifica­tion

VIII/H.20-040

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

Clas­sifica­tion by Hölzel

9.EI.320

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

IMA sta­tus

Status fragwürdig

Optical Properties

Color

beige weiß, gelbbraun, rosa

Streak color

weiß

Diaphane­ity (Trans­parency)

durchscheinend

max. Birefrin­gence

0.024

Birefringence chart\! Stevensite title=Birefringence chart Stevensite

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

1.521

RI value β

1.525

RI value γ / ε

1.545

Ri mean

1.530

2V angle

Biaxial (+) 35°!

Optical Data Luminescence

Color LW-UV (365nm)

 

gelblich weiß

Color SW-UV (254nm)

 

gelblich weiß

After­glow (Per­sistant Lumi­nes­cence)

keine Daten

Crystallography

Crystal Sys­tem

monoklin

Cell param­e­ters a (Å)

5.4

Cell param­e­ters b (Å)

9.1

Cell param­e­ters c (Å)

15.3

Cell param­e­ters a/b or c/a

0.593

Cell param­e­ters c/b

1.681

Cell param­e­ters α

90°

Cell param­e­ters β

97°a

Cell param­e­ters γ

90°

Z

2

Volumne (ų)

746.238

X-Ray Pow­der Diffrac­tion

26.5(20),
12.7(100),
4.54(60),
3.18(30),
2.55(100),
2.28(10),
1.520(40),
1.306(20)

XRD chart Stevensite

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

Physical Properties

Hard­ness (Mohs)

2.5

VHN (Hard­ness Vick­ers)

53 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.15 - 2.75 / Durchschnittlich = 2.45

1.795 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+++ HCl

(Co-)Type locality

(Co-)Type locality

USA/New Jersey/Hudson Co./Hoboken/Bergen Hill

Preface

Author (Name, Year)

Leeds, 1873

References

American Mineralogist 44 (1959), 342

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

'Kerolite'

(Mg,Ni)3Si4O10(OH)2·H2O

9.EC.45

'Spadaite'

MgSiO2(OH)2·H2O

9.EC.45

Sauconite

Na0.3Zn3(Si,Al)4O10(OH)2·4H2O

9.EC.45

'Stevensite'

(Ca|2)0.3Mg3Si4O10(OH)2

9.EC.45

Zincsilite

Zn3Si4O10(OH)2·4H2O

9.EC.45

Ferrosaponite

Ca0.3(Fe2+,Mg,Fe3+)3[(OH)2|(Si,Al)Si3O10]·4H2O

9.EC.45

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

'Hectorite'

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

VIII/H.20-010

Saponite

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

VIII/H.20-020

Ferrosaponite

Ca0.3(Fe2+,Mg,Fe3+)3[(OH)2|(Si,Al)Si3O10]·4H2O

VIII/H.20-027

'Spadaite'

MgSiO2(OH)2·H2O

VIII/H.20-030

'Stevensite'

(Ca|2)0.3Mg3Si4O10(OH)2

VIII/H.20-040

Sauconite

Na0.3Zn3(Si,Al)4O10(OH)2·4H2O

VIII/H.20-050

Zincsilite

Zn3Si4O10(OH)2·4H2O

VIII/H.20-060

Related minerals "Hoelzel Classification" [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.EI.300

Ferrosaponite

Ca0.3(Fe2+,Mg,Fe3+)3[(OH)2|(Si,Al)Si3O10]·4H2O

9.EI.310

'Stevensite'

(Ca|2)0.3Mg3Si4O10(OH)2

9.EI.320

Other languages

German

Stevensit

Spanish

Stevensita

French

Stevensite

English

Stevensite

Russian

Стевенсит

Russian

Стивенсит

Alternative Name

Spanish

Afrodita

Afrodite

German

Aphrodit

Spanish

Aphrodita

Aphrodite

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

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