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Strontiofluorite

Collectors Summary

Cleavages vollkommen (111)
Fracture treppenartig
Solubility - H2O, - verdünnte Säuren
Crystal System kubisch, Fm3m

Chemism

Chemical formula

SrF2

Additional chem. information

Fluorit Gruppe

Chemical composition

Strontium, Fluor

Unit weight: 125.6178065 u; Number of atoms in the formula: 3

Info

Empirical formula:

SrF2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Fluorine

F

30.25

2

66.67

18.9984033

37.9968065
Strontium

Sr

69.75

1

33.33

87.6210000

87.6210000

Analysis wt%

La : 2.14, Ce : 2.78, Nd : 0.64, Ba : 7.06, Sr : 42.81, Ca : 9.57, Na : 1.79, F : 33.15, Ln : 5.56 (Ref: Canadian Mineralogist 2010)

Strunz 9th edition incl. updates

3.AB.25

3: Halide (Fluoride, Chloride, Bromide, Iodide)
A: Einfache Halogenide ohne H2O
B: M:X = 1:2
25:Fluorit-Gruppe

Lapis Classification

III/A.08-015

III: HALOGENIDE (Fluoride, Chloride, Bromide, Jodide)
A: Einfache Halogenide
8: Wasserfrei, Metall : Halogen = 1:2, 1:3

Classification by Hölzel

3.AB.130

3: HALIDES
A: Simple Halides without H2O
B: Me/X=1/2
1: Fluorite-Group

IMA status

Anerkannt; Neue Mineralien - IMA WEB Seite - Juni 2009

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Fluorite Group

Optical Properties

max. Birefringence

0.000

RI value α / ω / n

1.438

Ri mean

1.438

2V angle

Isotropisch

Crystallography

Crystal System

kubisch

Class (H-M)

m3m

Space Group number

225

Space Group

Fm3m

Cell parameters a (Å)

5.713

Cell parameters b (Å)

-

Cell parameters c (Å)

-

Cell parameters a/b or c/a

1

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volume (ų)

186.463

X-Ray Powder Diffraction

3.324(100), 2.886(20), 2.029(90), 1.731(60), 1.434(20), 1.317(30), 1.172(50), 1.105(20)
XRD chart Strontiofluorite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

VHN (Hardness Vickers)

190 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.474 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen (111)

Fracture

treppenartig

Tenacity

spröde

Instability

- H2O, - verdünnte Säuren

(Co-)Type locality

(Co-)Type locality

Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Berg Koashva/Koashva Grube

Preface

Author (Name, Year)

V.N. Yakovenchuk, G.Y. Ivanyuk, Y.A. Pakhomovsky, E.A. Selivanova, J.A. Korchak, A.P. Nikolaev (2010)

References

Neue Mineralien - IMA WEB Seite - Juni 2009

V.N. Yakovenchuk, G.Y. Ivanyuk, Y.A. Pakhomovsky, E.A. Selivanova, J.A. Korchak, A.P. Nikolaev: Strontiofluorite, SrF2, a new mineral species from the Khibiny Massif, Kola Peninsula, Russia. Can. Mineral. Vol. 48 (2010) S. 1487–1492.

M.D. Welch, Dorian G.W. Smith, Fernando Camara, and G. Diego Gatta: New Mineral Names. American Mineralogist Vol. 98, Nr. 1 (2013) S. 279-282.

IMA group assignments

Other languages

German

Strontiofluorit

English

Strontiofluorite

Russian

Стронциофлюорит

CNMNC (IMA)-Number

IMA 2009-014

CNMNC symbol

Symbol

Sflr

Locations with GPS information

IDs

GUSID (Global unique identifier short form) zGJaQR4fHUq9NZKlV0RY3w
GUID (Global unique identifier) 415A62CC-1F1E-4A1D-BD35-92A5574458DF
Database ID 5213