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Sheldrickite

Pictures (2 Images total)

Sheldrickit
Views (Image: 1263153416): 646
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 (Image: 1263153452): 654
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

Volumne (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

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

Sheldrickite

NaCa3(CO3)2F3·H2O

trigonal : 3 : P32

5.DC.15

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

Sheldrickite

NaCa3(CO3)2F3·H2O

trigonal : 3 : P32

V/E.10-005

Thorbastnäsite

ThCa(CO3)2F2·3H2O

hexagonal : 6m2 : P62c

V/E.10-010

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

Peterbaylissite

Hg3CO3(OH)·2H2O

orthorhombisch : mmm : Pcab

5.DF.300

Clearcreekite

Hg31+[OH|CO3]·2H2O

monoklin : 2/m : P21/c

5.DF.310

Barstowite

3PbCl2·PbCO3·H2O

monoklin : 2/m : P21/m

5.DF.330

Sheldrickite

NaCa3(CO3)2F3·H2O

trigonal : 3 : P32

5.DF.360

Related minerals "Dana 8. Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Shannonite

Pb2O(CO3)

orthorhombisch : 222 : P212121

16a.03.10.01

Sheldrickite

NaCa3(CO3)2F3·H2O

trigonal : 3 : P32

16a.03.11.01

Other languages

German

Sheldrickit

Spanish

Sheldrickita

English

Sheldrickite

French

Sheldrickite

Russian

Шелдрикит

IMA Number

IMA 1996-019

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

German pages

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Russian pages

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