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Sheldrickite

Pictures (2 Images total)

Sheldrickit
Views (File:
1263153416
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Sheldrickit
Bildbreite: 2 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/Montérégie, Region/La Vallée-du-Richelieu RCM/Mont Saint-Hilaire/Poudrette Quarry (Demix Quarry; Uni-Mix Quarry; Desourdy Quarry)
Mineral: Sheldrickite
Image: 1263153416
Rating: 5 (votes: 1)
License: Usage for Mineralienatlas project only
Sheldrickit

Bildbreite: 2 mm; Fundort: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville Co., Québec, Kanada

Copyright: Stephan Wolfsried
Contribution: Hg 2010-01-10
Locality: Poudrette Quarry (Demix Quarry; Uni-Mix Quarry; Desourdy Quarry) / Mont Saint-Hilaire / La Vallée-du-Richelieu RCM / Montérégie, Region / Québec / Kanada
Sheldrickit
Views (File:
1263153452
): 748
Sheldrickit
Bildbreite: 2 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/Montérégie, Region/La Vallée-du-Richelieu RCM/Mont Saint-Hilaire/Poudrette Quarry (Demix Quarry; Uni-Mix Quarry; Desourdy Quarry)
Mineral: Sheldrickite
Image: 1263153452
License: Usage for Mineralienatlas project only
Sheldrickit

Bildbreite: 2 mm; Fundort: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville Co., Québec, Kanada

Copyright: Stephan Wolfsried
Contribution: Hg 2010-01-10
Locality: Poudrette Quarry (Demix Quarry; Uni-Mix Quarry; Desourdy Quarry) / Mont Saint-Hilaire / La Vallée-du-Richelieu RCM / Montérégie, Region / Québec / Kanada

Collectors Summary

Color farblos, weiß
Streak color weiß
Hardness (Mohs) 3
Cleavages gut {001} teilbar
Fracture uneben
Crystal System trigonal, P32

Chemism

Chemical formula

NaCa3(CO3)2F3·H2O

Chemical composition

Calcium, Natrium, Fluor, Kohlenstoff, Sauerstoff, Wasserstoff

Unit weight: 338.25364395 u; Number of atoms in the formula: 18

Info

Empirical formula:

NaCa3(CO3)2F3·H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.60

2

11.11

1.0079470

2.0158940

Carbon

C

7.10

2

11.11

12.0107800

24.0215600

Oxygen

O

33.11

7

38.89

15.9994300

111.9960100

Fluorine

F

16.85

3

16.67

18.9984033

56.9952098

Sodium

Na

6.80

1

5.56

22.9897702

22.9897702

Calcium

Ca

35.55

3

16.67

40.0784000

120.2352000

Analysis wt%

Na2O : 9.16, CaO : 48.84, CO2 : 25.81, F : 16.17, H2O : 5.61 (Ref: Canadian Mineralogist 97)

Strunz 9th edition incl. updates

5.DC.15

5: Carbonate (Carbonate, Nitrate)
D: Carbonate mit weitere Anionen, mit H2O
C: Mit großen [Kationen]
15:Sheldrickit-Gruppe

Lapis Classification

V/E.10-005

V: NITRATE, CARBONATE UND BORATE
E: Wasserhaltige Carbonate, mit fremden Anionen

Classification by Hölzel

5.DF.360

5: CARBONATES NITRATES ARSENITES SULFITES SELENITES TELLURITES IODATES
D: Carbonates (+Anions +Water)
F: With large Cations
3: Without RE-Elements

Dana 8th edition

16a.03.11.01

16a: Carbonates - Hydroxyl or Halogen
03: Carbonates - Hydroxyl or Halogen where (A B)2 (XO3) Zq

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos, weiß

Streak color

weiß

Diaphaneity (Transparency)

transparent bis durchscheinend

max. Birefringence

0.025

Birefringence chart\! Sheldrickite title=Birefringence chart Sheldrickite

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

1.538

RI value γ / ε

1.563

Ri mean

1.546

2V angle

Uniaxial (+)

Crystallography

Crystal System

trigonal

Class (H-M)

3

Space Group number

145

Space Group

P32

Cell parameters a (Å)

6.718

Cell parameters b (Å)

-

Cell parameters c (Å)

15.050

Cell parameters a/b or c/a

2.240

Cell parameters c/b

-

Z

3

Volume (ų)

588.23

X-Ray Powder Diffraction

5.81(30),
5.01(30),
3.358(30),
2.791(50),
2.508(40),
2.199(20),
2.010(100),
1.939(40)

XRD chart Sheldrickite

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)

3

VHN (Hardness Vickers)

83 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.86

2.864 ( ρ calc. Mineralienatlas )

Cleavages

gut {001} teilbar

Fracture

uneben

Tenacity

spröde

Preface

Author (Name, Year)

Grice & Gault & Van Velthuizen, 1997

References

Canadian Mineralogist 35 (1997), 181

Other languages

German

Sheldrickit

Spanish

Sheldrickita

English

Sheldrickite

French

Sheldrickite

Russian

Шелдрикит

CNMNC (IMA)-Number

IMA 1996-019

CNMNC symbol

Symbol

Sdk

Locations with GPS information

IDs

GUSID (Global unique identifier short form) nc5mgjP5qk2AewHaiYqJYw
GUID (Global unique identifier) 8266CE9D-F933-4DAA-807B-01DA898A8963
Database ID 3499