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Thomsonite-Sr

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Thomsonit-Sr
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Thomsonit-Sr

weiße, radialstrahalige Kristalle von Thomsonit-Sr, Rasvumchorr, Chibiny Massif, Halbinsel Kola, Russland; BB < 1 cm, analysiert

Copyright: mintreasure.com
Contribution: openpit 2022-03-13
Locality: Rasvumchorr / Chibiny (Khibiny) / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland

Collectors Summary

Color bräunlich grau, farblos, grau, weiß, rosa
Streak color weiß
Hardness (Mohs) 4 - 5
Cleavages vollkommen {100} und gut {010}
Solubility +++ Säuren
Crystal System orthorhombisch, Pcnn

Chemism

Chem­ical formula

Na(Sr,Ca)2(Al5Si5)O20·6-7H2O

Chem­ical com­po­si­tion

Aluminium, Calcium, Natrium, Silicium, Strontium, Sauerstoff, Wasserstoff

Unit weight: 886.8840172 u; Number of atoms in the formula: 52.5

Info

Empirical formula:

Na(Sr0.75Ca0.25)2(Al5Si5)O20·6.5H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

1.48

13

24.76

1.0079470

13.1033110

Oxygen

O

47.81

26.5

50.48

15.9994300

423.9848950

Sodium

Na

2.59

1

1.90

22.9897702

22.9897702

Aluminium

Al

15.21

5

9.52

26.9815382

134.9076910

Silicon

Si

15.83

5

9.52

28.0855300

140.4276500

Calcium

Ca

2.26

0.5

0.95

40.0784000

20.0392000

Strontium

Sr

14.82

1.5

2.86

87.6210000

131.4315000

Anal­y­sis wt%

Ø SiO2 : 33.51, Al2O3 : 27.65, SrO : 16.27, CaO : 3.85, Na2O : 3.22, H2O : 14.10 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 2001)

Strunz 9th edi­tion incl. updates

9.GA.10

9: Silikate (Germanate)
G: Gerüstsilikate (Tektosilikate) mit zeolithischem H2O; Familie der Zeolithe
A: [Zeolithe] mit vierer-Ring Ketten über ein fünftes [Si] verbunden
10:Thomsonit-Gruppe

Lapis Clas­sifica­tion

VIII/J.21-080

VIII: SILIKATE
J: Gerüstsilikate (mit Zeolithen)
21: Zeolith-Gruppe; Faserzeolithe

Clas­sifica­tion by Hölzel

9.FI.320

9: SILICATES
F: Tektosilicates
I: Fibrous Zeolites

Dana 8th edi­tion

77.01.05.10

77: Tektosilicates Tectosilicate Zeolite group
01: Tektosilicates Tectosilicate Zeolite group true zeolites
05: Natrolite and related species

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

Zeolite group  ⇒ THO zeolite structure group  ⇒ Thomsonite serie

Optical Properties

Color

bräunlich grau, farblos, grau, weiß, rosa

Streak color

weiß

Diaphane­ity (Trans­parency)

transparent bis durchscheinend

max. Birefrin­gence

0.012

Birefringence chart\! Thomsonite-Sr title=Birefringence chart Thomsonite-Sr

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

1.528

RI value β

1.532

RI value γ / ε

1.540

Ri mean

1.533

2V angle

Biaxial (+) 62°

Crystallography

Crystal Sys­tem

orthorhombisch

Class (H-M)

mmm

Space Group number

52

Space Group

Pcnn

Cell param­e­ters a (Å)

13.050

Cell param­e­ters b (Å)

13.123

Cell param­e­ters c (Å)

13.241

Cell param­e­ters a/b or c/a

0.994

Cell param­e­ters c/b

1.009

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

2267.589

X-Ray Pow­der Diffrac­tion

6.63(70),
4.66(80),
3.49(90),
3.19(80),
2.960(100),
2.860(100),
2.691(100),
2.186(60)

XRD chart Thomsonite-Sr

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

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

4 - 5

VHN (Hard­ness Vick­ers)

390 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.69 (gemessen) 2.36 (berechnet)

2.598 ( ρ calc. Mineralienatlas )

Cleav­ages

vollkommen {100} und gut {010}

Tenac­ity

spröde

Insta­bil­ity

+++ Säuren

Preface

Author (Name, Year)

Pekov etc., 2001

References

American Mineralogist 77 (1992), 685.

Mineralogical Magazine 44 (1981), 231.

Acta Crystallographica C46 (1990), 1370-1373.

Canadian Mineralogist 35 (1997), 1571.

IMA group assignments

Other languages

German

Thomsonit-Sr

Spanish

Thomsonita-Sr

French

Thomsonite-Sr

English

Thomsonite-Sr

Russian

Томсонит-Sr

Simplified Chinese

锶杆沸石

Traditional Chinese

锶桿沸石

CNMNC (IMA)-Number

IMA 2000-025

CNMNC symbol

Symbol

Thm-Sr

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

German pages

DeWikiPedia - search for: Thomsonit-Sr
Google-Bilder-Suche - search for: Thomsonit-Sr
Mineralienatlas.de (Forum) - search for: Thomsonit-Sr

English pages

Mindat - search for: Thomsonite-Sr
Webmineral - search for:Thomsonite-Sr
Handbook-of-Mineralogy - search for: Thomsonite-Sr
RRUFF - Raman, XRD and other mineral data - search for: Thomsonite-Sr
RRUFF - References and PDF downloads - search for: Thomsonite-Sr
American-Mineralogist-Crystal-Structure-Database - search for: Thomsonite-Sr
Strahlen.org - search for: Thomsonite-Sr

Russian pages

Webmineral.ru - search for: Томсонит-Sr

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Thomsonit-Sr
Crystal-Treasure.com - search for: Thomsonit-Sr
Bosse - search for: Thomsonit-Sr
Edelsteine Neuburg - Gundolf Fischer - search for: Thomsonit-Sr

Locations with GPS information