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Ferri-fluoro-katophorite from
Bear Lake diggings (Gibson Road Western occurrence), Monmouth Township, Haliburton County, Ontario, Canada

Locality type:Diggings
Classification
Species:Ferri-fluoro-katophorite
Formula:Na(CaNa)(Mg4Fe3+)(AlSi7O22)F2
Comments:Data from Hawthorne et al. (2006) give the following composition:
(Na0.507K0.315)0.822(Ca1.177Na0.823)2.000(Li0.023Zn0.003Mg3.276Mn0.049Fe2+1.007Fe3+0.486Ti0.081Al0.053)4.970(Si7.326Al0.638)8.000(F1.277OH0.723)2.000
Habit:Large well formed crystals
Colour:dark brown to black
Quality for species:Excellent - world class for species or very significant. (!!)
Abundance at site:Common
Confirmation
Validity:Valid - Type Locality
References
References: Hawthorne, F.C., Oberti, R., Martin, R.F. (2006): Short-range order in amphiboles from the Bear Lake Diggings, Ontario. Canadian Mineralogist, 44, 1171-1179. ; Oberti, R., Boiocchi, M., Hawthorne, F.C., Ball, N.A., Martin, R.F. (2016) Ferrifluoro-katophorite, IMA 2015-096. CNMNC Newsletter No. 29, February 2016, 203. Mineralogical Magazine: 80: 199–205
Associated Minerals Based on Photo Data:
Fluorapatite6 photos of Ferri-fluoro-katophorite associated with Fluorapatite at this locality.
Calcite4 photos of Ferri-fluoro-katophorite associated with Calcite at this locality.
Scapolite3 photos of Ferri-fluoro-katophorite associated with Scapolite at this locality.
Titanite2 photos of Ferri-fluoro-katophorite associated with Titanite at this locality.
Data
Mineral Data:Click here to view Ferri-fluoro-katophorite data
Locality Data:Click here to view Bear Lake diggings (Gibson Road Western occurrence), Monmouth Township, Haliburton County, Ontario, Canada
Photo GalleryView Gallery (14 photos)
 
Mineral and/or Locality  
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