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Steacyite (Steacyit)

Pictures (21 Images total)

Steacyit
Views (File:
1182808703
): 1553
Steacyit
Fundort Mont Saint-Hilaire, Quebéc, Kanada
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Kanada/Québec, Provinz/Montérégie, Region/La Vallée-du-Richelieu RCM/Mont Saint-Hilaire/Poudrette Quarry (Demix Quarry; Uni-Mix Quarry; Desourdy Quarry)
Mineral: Steacyite
Image: 1182808703
Rating: 9 (votes: 3)
License: Usage for Mineralienatlas project only
Steacyit

Fundort Mont Saint-Hilaire, Quebéc, Kanada
Copyright: Stephan Wolfsried
Contribution: Hg 2007-06-25
Locality: Poudrette Quarry (Demix Quarry; Uni-Mix Quarry; Desourdy Quarry) / Mont Saint-Hilaire / La Vallée-du-Richelieu RCM / Montérégie, Region / Québec, Provinz / Kanada
Steacyit
Views (File:
1287942833
): 967
Steacyit
Größe: 0,91 mm; Fundort: Poudrette Quarry, Mont Saint-Hilaire, Rouville Co., Québec, Kanada
Copyright: Matteo Chinellato; Contribution: Hg
Collection: Domenico Preite
Location: Kanada/Québec, Provinz/Montérégie, Region/La Vallée-du-Richelieu RCM/Mont Saint-Hilaire/Poudrette Quarry (Demix Quarry; Uni-Mix Quarry; Desourdy Quarry)
Mineral: Steacyite
Image: 1287942833
Rating: 9 (votes: 2)
License: Usage for Mineralienatlas project only
Steacyit

Größe: 0,91 mm; Fundort: Poudrette Quarry, Mont Saint-Hilaire, Rouville Co., Québec, Kanada
Collection: Domenico Preite
Copyright: Matteo Chinellato
Contribution: Hg 2010-10-24
Locality: Poudrette Quarry (Demix Quarry; Uni-Mix Quarry; Desourdy Quarry) / Mont Saint-Hilaire / La Vallée-du-Richelieu RCM / Montérégie, Region / Québec, Provinz / Kanada
Steacyit
Views (File:
1238079089
): 1027
Steacyit
Bildbreite: 3 mm; Fundort: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville Co., Québec, Kanada
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Kanada/Québec, Provinz/Montérégie, Region/La Vallée-du-Richelieu RCM/Mont Saint-Hilaire/Poudrette Quarry (Demix Quarry; Uni-Mix Quarry; Desourdy Quarry)
Mineral: Steacyite
Image: 1238079089
Rating: 8.33 (votes: 3)
License: Usage for Mineralienatlas project only
Steacyit

Bildbreite: 3 mm; Fundort: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville Co., Québec, Kanada
Copyright: Stephan Wolfsried
Contribution: Hg 2009-03-26
Locality: Poudrette Quarry (Demix Quarry; Uni-Mix Quarry; Desourdy Quarry) / Mont Saint-Hilaire / La Vallée-du-Richelieu RCM / Montérégie, Region / Québec, Provinz / Kanada
Steacyit
Views (File:
1130010704
): 975
Steacyit
Bildbreite: 4 mm; Fundort: Mont Saint-Hilaire
Copyright: Stephan Wolfsried; Contribution: JHM
Location: Kanada/Québec, Provinz/Montérégie, Region/La Vallée-du-Richelieu RCM/Mont Saint-Hilaire/Poudrette Quarry (Demix Quarry; Uni-Mix Quarry; Desourdy Quarry)
Mineral: Steacyite
Image: 1130010704
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Steacyit

Bildbreite: 4 mm; Fundort: Mont Saint-Hilaire

Copyright: Stephan Wolfsried
Contribution: JHM 2005-10-22
Locality: Poudrette Quarry (Demix Quarry; Uni-Mix Quarry; Desourdy Quarry) / Mont Saint-Hilaire / La Vallée-du-Richelieu RCM / Montérégie, Region / Québec, Provinz / Kanada
Steacyit
Views (File:
1274651704
): 1156
Steacyit
Kristallgröße: 0,8 cm, Fundort: Dara-i-Pioz, Tien Shan-Gebirge, Tadschikistan
Copyright: Dan Weinrich; Contribution: thdun5
Location: Tadschikistan/Republik-unterstellte Gebiete (Nohijahoi tobei Dschumhurij)/Dara-i-Pioz (Darai-Pioz)
Mineral: Steacyite
Image: 1274651704
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Steacyit

Kristallgröße: 0,8 cm, Fundort: Dara-i-Pioz, Tien Shan-Gebirge, Tadschikistan
Copyright: Dan Weinrich
Contribution: thdun5 2010-05-23
Locality: Dara-i-Pioz (Darai-Pioz) / Republik-unterstellte Gebiete (Nohijahoi tobei Dschumhurij) / Tadschikistan

Collectors Summary

Color braun, gelbgrün
Streak color weiß
Hardness (Mohs) 5
Crystal System tetragonal, P4/mcc

Chemism

Chemical formula

Th(Ca,Na)2K1-xSi8O20

Chemical composition

Calcium, Natrium, Silicium, Thorium, Kalium, Sauerstoff

Analysis wt%

SiO2 : 57.92, ThO2 : 28.03, Ln2O3 : 0.47, CaO : 4.92, MnO : 1.64, Na2O : 3.36, K2O : 3.42 (Ref: Canadian Mineralogist 82)

Strunz 9th edition incl. updates

9.CH.10

9: Silikate (Germanate)
C: Ringsilikate (Cyclosilikate)
H: ~[Si4O12]9- vierer-Doppelringe
10:Steacyit-Gruppe

Lapis Classification

VIII/E.10-030

VIII: SILIKATE
E: Ringsilikate
10: Doppelte Viererringe [Si8O20] 8-

Classification by Hölzel

9.CB.820

9: SILICATES
C: Cyclosilicates
B: ~[Si4O12]8-, ~[Si4O10]4--Rings
8: Ekanite-Group

Dana 8th edition

63.01.01.01

63: Cyclosilicates Cyclosilicate Condensed Rings
01: Cyclosilicates Cyclosilicate Condensed Rings 4-membered rings
01: Steacyite Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

braun, gelbgrün

Streak color

weiß

Diaphaneity (Transparency)

durchscheinend

max. Birefringence

0.001
Birefringence chart\! Steacyite title=Birefringence chart Steacyite

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

1.573

RI value γ / ε

1.572

Ri mean

1.573

2V angle

Uniaxial (-)

Optical Data Luminescence

Color LW-UV (365nm)

  

grün

LW-UV Intensity

stark

Color SW-UV (254nm)

  

grün

SW-UV Intensity

stark

Most Common Activator

(UO2)2+ (Uranyl-Ion) als Verunreinigungen

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

tetragonal

Class (H-M)

4/mmm

Space Group number

124

Space Group

P4/mcc

Cell parameters a (Å)

7.58

Cell parameters b (Å)

-

Cell parameters c (Å)

14.77

Cell parameters a/b or c/a

1.949

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

2

Volume (ų)

848.631

X-Ray Powder Diffraction

5.37(10),
5.30(40),
3.38(100),
3.32(50),
2.64(40),
2.16(20),
2.00(30),
1.821(20)
XRD chart Steacyite

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)

5

VHN (Hardness Vickers)

390 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.95

Radioactivity

radioaktiv

(Co-)Type locality

(Co-)Type locality

Kanada/Québec, Provinz/Montérégie, Region/La Vallée-du-Richelieu RCM/Mont Saint-Hilaire

Preface

Author (Name, Year)

Perrault & Szymanski, 1982

Safety Instructions

Industrial chemicals are often present in powder form and therefore often contain much higher dangers than natural, crystalline substances. These hazard statements refer to the classification of industrially used chemical compounds that may also occur in this natural mineral. The hazard classification makes no claim to completeness.




Safety classes: Ionizing radiation: Radioaktiv

References

Canadian Mineralogist 20 (1982), 59

Other languages

German

Steacyit

French

Steacyite

English

Steacyite

Spanish

Steacyíta

Ukrainian

Стисиит

Traditional Chinese

斯矽鉀釷鈣石

Simplified Chinese

斯硅钾钍钙石

Alternative Name

Unnamed (MSH UK-4)

Russian

Стисиит

CNMNC (IMA)-Number

IMA 1981-E

CNMNC symbol

Symbol

Scy

Locations with GPS information

IDs

GUSID (Global unique identifier short form) dLNIyMlbWkOPTfFD7WFOVg
GUID (Global unique identifier) C848B374-5BC9-435A-8F4D-F143ED614E56
Database ID 3614