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Edgrewite

Collectors Summary

Crystal System monoklin, P21/b

Chemism

Chem­ical formula

Ca9(SiO4)4F2

Addi­tional chem. informa­tion

Humit-Gruppe

Chem­ical com­po­si­tion

Calcium, Silicium, Fluor, Sauerstoff

Unit weight: 767.0354065 u; Number of atoms in the formula: 31

Info

Empirical formula:

Ca9(SiO4)4F2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

33.37

16

51.61

15.9994300

255.9908800

Fluorine

F

4.95

2

6.45

18.9984033

37.9968065

Silicon

Si

14.65

4

12.90

28.0855300

112.3421200

Calcium

Ca

47.03

9

29.03

40.0784000

360.7056000

Strunz 9th edi­tion incl. updates

9.AF.50

9: Silikate (Germanate)
A: Inselsilikate (Nesosilikate)
F: Insel(Neso)silikate mit zusätzlichem Anionen; Kationen in [4], [5] und/oder nur [6] Koordination
50:Humit-Gruppe

Lapis Clas­sifica­tion

VIII/B.04-120

VIII: SILIKATE
B: Inselsilikate mit tetraederfremden Anionen
4: Kationen in tetraedrischer oder oktaedrischer Koordination [4/6]; Humit-Gruppe

Clas­sifica­tion by Hölzel

9.AI.225

9: SILICATES
A: Nesosilicates
I: Nesosilicates with OH
2: Norbergite-Group

IMA sta­tus

anerkannt - CNMNC Newsletter - NEW MINERAL PROPOSALS APPROVED IN SEPTEMBER 2011

Min­eral sta­tus

anerkanntes Mineral

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/b

Cell param­e­ters a (Å)

5.069

Cell param­e­ters b (Å)

11.358

Cell param­e­ters c (Å)

15.400

Cell param­e­ters a/b or c/a

0.446

Cell param­e­ters c/b

1.356

Cell param­e­ters α

90°

Cell param­e­ters β

100.58

Cell param­e­ters γ

90°

Z

2

Volumne (ų)

871.562

Kristall struc­ture

Struktur bestimmt

X-Ray Pow­der Diffrac­tion

3.542(51), 3.029(100), 2.863(42), 2.823(79), 2.765(64), 2.657(44), 2.625(55), 1.907(59)

XRD chart Edgrewite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

2.923 ( ρ calc. Mineralienatlas )

Preface

Author (Name, Year)

Galuskin, E.V., Armbruster, T., Pertsev, N.N., Galuskina, I.O., Lazic, B., Gazeev, V.M., Wlodyka, R., Dulski, M., Dzierżanowski, P., Zadov, A.E. and Dubrovinsky, L. (2011)

References

http://www.ises.su/2011/pdf_lectures/galuskin.pdf [Bild, etc. in russisch]

Galuskin, E.V., Armbruster, T., Pertsev, N.N., Galuskina, I.O., Lazic, B., Gazeev, V.M., Wlodyka, R., Dulski, M., Dzierżanowski, P., Zadov, A.E. and Dubrovinsky, L. (2011) Edgrewite, IMA 2011-058. CNMNC Newsletter No. 11, December 2011, page 2888; Mineralogical Magazine, 75, 2887-2893.

Other languages

German

Edgrewit

English

Edgrewite

Russian

Эдгрюит

CNMNC (IMA)-Number

IMA 2011-058

CNMNC symbol

Symbol

Egr

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