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Fluorocronite

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Formula:
PbF2
Colour:
white
Lustre:
Pearly
Hardness:
3 - 4
Specific Gravity:
7.619 (Calculated)
Crystal System:
Isometric
Member of:
Name:
The name is in relation to the composition; fluoro (for fluorine) and cron (κρόνος, the alchemical name for lead).
Isostructural with:
Hide all sections | Show all sections

Classification of FluorocroniteHide

Approved
Approval Year:
2010
3.AB.

3 : HALIDES
A : Simple halides, without H2O
B : M:X = 1:2

Physical Properties of FluorocroniteHide

Pearly
Transparency:
Translucent
Colour:
white
Streak:
white
Hardness:
3 - 4 on Mohs scale
Cleavage:
Perfect
111
Density:
7.619 g/cm3 (Calculated)

Optical Data of FluorocroniteHide

Type:
Isotropic

Chemical Properties of FluorocroniteHide

Formula:
PbF2

Crystallography of FluorocroniteHide

Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Fm3m
Cell Parameters:
a = 5.9306(5) Å
Unit Cell V:
208.59 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.437 (100)
2.976 (46)
2.103 (44)
1.794 (42)
1.717 (21)

Type Occurrence of FluorocroniteHide

Place of Conservation of Type Material:
Fersman Mineralogical Museum, catalogue number 3987/1
and Natural History Museum of Los Angeles County, catalogue number 63316.

Synonyms of FluorocroniteHide

Other Language Names for FluorocroniteHide

Relationship of Fluorocronite to other SpeciesHide

Member of:
Other Members of this group:
FluoriteCaF2Iso. m3m (4/m 3 2/m) : Fm3m
StrontiofluoriteSrF2Iso. m3m (4/m 3 2/m) : Fm3m

Common AssociatesHide

Associated Minerals Based on Photo Data:
Cassiterite1 photo of Fluorocronite associated with Cassiterite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

3.AB.05TolbachiteCuCl2Mon.
3.AB.10CocciniteHgI2Tet.
3.AB.15SellaiteMgF2Tet. 4/mmm (4/m 2/m 2/m) : P42/mnm
3.AB.20ChloromagnesiteMgCl2Hex.
3.AB.20Lawrencite(Fe2+,Ni)Cl2Trig. 3m (3 2/m) : R3m
3.AB.20ScacchiteMnCl2Trig. 3m (3 2/m) : R3m
3.AB.25FluoriteCaF2Iso. m3m (4/m 3 2/m) : Fm3m
3.AB.25FrankdicksoniteBaF2Iso. m3m (4/m 3 2/m) : Fm3m
3.AB.25StrontiofluoriteSrF2Iso. m3m (4/m 3 2/m) : Fm3m
3.AB.30Tveitite-(Y)(Y, Na)6Ca6Ca6F42Trig. 3 : R3
3.AB.35Gagarinite-(Y)NaCaYF6Hex. 6/m : P63/m
3.AB.35Gagarinite-(Ce)Na(REExCa1-x)(REEyCa1-y)F6Trig.
3.AB.35Polezhaevaite-(Ce)NaSrCeF6Hex. 6/m : P63/m

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for FluorocroniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Mills S.J., Kartashov P.M., Gamyanin G.N., Whitfield P.S., Kern A., Guerault H., Kampf A.R., Raudsepp M. (2011) Fluorocronite, the natural analogue of β-PbF2, from the Saha Republic, Russian Federation. Eur. J. Min., 23, 695-700.

Internet Links for FluorocroniteHide

Localities for FluorocroniteHide

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Russia (TL)
 
  • Eastern-Siberian Region
    • Sakha Republic (Saha Republic; Yakutia)
      • Sarychev Range
Mills S.J., Kartashov P.M., Gamyanin G.N., Whitfield P.S., Kern A., Guerault H., Kampf A.R., Raudsepp M. (2011) Fluorocronite, the natural analogue of β-PbF2, from the Saha Republic, Russian Federation. European Journal of Mineralogy, 23, 695-700.
Mineral and/or Locality  
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