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Perbøeite-(Ce)

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Formula:
(CaCe3)(Al3Fe2+)(Si2O7)(SiO4)3O(OH)2
Colour:
Grayish-green to very pale green
Lustre:
Vitreous
Hardness:
6 - 7
Specific Gravity:
4.474 (Calculated)
Crystal System:
Monoclinic
Member of:
Name:
Named after the Norwegian mineralogist Per Bøe (1937-), Tromsø University.
Member of a polysomatic series having epidote and törnebohmite as end-members.
Forms a continuous solid-solution series with alnaperbøeite-(Ce).

Members of the perbøeite-(Ce)–alnaperbøeite-(Ce) solid solution are topologically identical to the minerals gatelite-(Ce) and västmanlandite-(Ce). Perbøeite-(Ce) derives from gatelite-(Ce) by the homovalent substitution [M3Fe2+ → M3Mg].

Both perbøeite-(Ce) and alnaperbøeite-(Ce) may be present in a single crystal, and the two cannot be distinguished visually. For photos see Alnaperbøeite-(Ce)-Perbøeite-(Ce) Series.




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Classification of Perbøeite-(Ce)Hide

Approved
Approval Year:
2011

Physical Properties of Perbøeite-(Ce)Hide

Vitreous
Transparency:
Transparent
Colour:
Grayish-green to very pale green
Streak:
white
Hardness:
6 - 7 on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
{100} good, {001} imperfect
Fracture:
Irregular/Uneven
Density:
4.474 g/cm3 (Calculated)

Optical Data of Perbøeite-(Ce)Hide

Type:
Biaxial (+)
RI values:
nα = 1.788(2) nβ = 1.793(2) nγ = 1.820(5)
2V:
Measured: 30.0° (5)
Max Birefringence:
δ = 0.032
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
weak
Pleochroism:
Weak
Comments:
colorless, grayish blue

Chemical Properties of Perbøeite-(Ce)Hide

Formula:
(CaCe3)(Al3Fe2+)(Si2O7)(SiO4)3O(OH)2
IMA Formula:
(CaCe3)(Al3Fe2+)(Si2O7)(SiO4)3O(OH)2

Crystallography of Perbøeite-(Ce)Hide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Cell Parameters:
a = 8.9277(6) Å, b = 5.6548(6) Å, c = 17.587(1) Å
β = 116.475(8)°
Ratio:
a:b:c = 1.579 : 1 : 3.11
Unit Cell V:
794.8 ų
Morphology:
Sub- to euhedral Gatelite-like crystals, up to 400 μm in size.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
15.7(75)
4.62(30)
3.489(40)
2.971(100)
2.828(50)
2.739(30)
2.619(60)
2.140(25)

Type Occurrence of Perbøeite-(Ce)Hide

General Appearance of Type Material:
Gatelite-like crystals, some intimately inter- or overgrown by törnebohmite-(Ce)
Place of Conservation of Type Material:
Museo di Storia Naturale, Universita`degli. Studi di Firenze, Firenze, Italy, catalogue number 3110/I
Geological Setting of Type Material:
In yttrian fluorite from pegmatites of the Tysfjord granite, Norway.
Associated Minerals at Type Locality:

Synonyms of Perbøeite-(Ce)Hide

Other Language Names for Perbøeite-(Ce)Hide

Relationship of Perbøeite-(Ce) to other SpeciesHide

Member of:
Other Members of this group:
Alnaperbøeite-(Ce)(CaCe2.5Na0.5)(Al4)(Si2O7)(SiO4)3O(OH)2Mon. 2/m : P21/m
Ferriperbøeite-(Ce)(CaCe3)(Fe3+Al2Fe2+)(Si2O7)(SiO4)3O(OH)2Mon. 2/m : P21/m
Gatelite-(Ce)CaCe3Al2(Al,Mg)(Mg,Fe2+,Al)(Si2O7)(SiO4)3(O,F)(OH,O)2Mon. 2/m : P21/b
UM2007-35-SiO:AlCaFFeMgREECa(Ce,La)3Al2Fe2+2(Si2O7)(SiO4)3(OH)2F
Västmanlandite-(Ce)Ce3CaMg2Al2Si2O15(OH)2FMon. 2/m : P21/m
Forms a series with:

Common AssociatesHide

Associated Minerals Based on Photo Data:
Alnaperbøeite-(Ce)1 photo of Perbøeite-(Ce) associated with Alnaperbøeite-(Ce) on mindat.org.

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 Perbøeite-(Ce)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Bonazzi, P., Bindi, L., Chopin, C., Husdal, T.A. and Lepore, G.O. (2011): IMA 2011-055. CNMNC Newsletter No. 11, December 2011, page 2888; Mineralogical Magazine, 75, 2887-2893.
Bonazzi, P., Lepore, G.O., Bindi, L.. Chopin, C., Husdal, T.A. & Medenbach, O. (2014): Perbøeite-(Ce) and alnaperbøeite-(Ce), two new members of the epidote-törnebohmite polysomatic series: Chemistry, structure, dehydrogenation, and clue for a sodian epidote end-member. American Mineralogist. 99, 157-169.

Internet Links for Perbøeite-(Ce)Hide

Localities for Perbøeite-(Ce)Hide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

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.
Norway (TL)
 
  • Nordland
    • Tysfjord
      • Drag
        • Eivollen
Bonazzi, P., Bindi, L., Chopin, C., Husdal, T.A. and Lepore, G.O. (2011): IMA 2011-055. CNMNC Newsletter No. 11, December 2011, page 2888; Mineralogical Magazine, 75, 2887-2893; Bonazzi, P., Lepore, G.O., Bindi, L.. Chopin, C., Husdal, T.A. & Medenbach, O. (2014): Perbøeite-(Ce) and alnaperbøeite-(Ce), two new members of the epidote-törnebohmite polysomatic series: Chemistry, structure, dehydrogenation, and clue for a sodian epidote end-member. American Mineralogist. 99, 157-169
Bonazzi, P., Bindi, L., Chopin, C., Husdal, T.A. and Lepore, G.O. (2011): IMA 2011-055. CNMNC Newsletter No. 11, December 2011, page 2888; Mineralogical Magazine, 75, 2887-2893; Bonazzi, P., Lepore, G.O., Bindi, L.. Chopin, C., Husdal, T.A. & Medenbach, O. (2014): Perbøeite-(Ce) and alnaperbøeite-(Ce), two new members of the epidote-törnebohmite polysomatic series: Chemistry, structure, dehydrogenation, and clue for a sodian epidote end-member. American Mineralogist. 99, 157-169
Bonazzi, P., Bindi, L., Chopin, C., Husdal, T.A. and Lepore, G.O. (2011): IMA 2011-055. CNMNC Newsletter No. 11, December 2011, page 2888; Mineralogical Magazine, 75, 2887-2893 ; Bonazzi, P., Lepore, G.O., Bindi, L.. Chopin, C., Husdal, T.A. & Medenbach, O. (2014): Perbøeite-(Ce) and alnaperbøeite-(Ce), two new members of the epidote-törnebohmite polysomatic series: Chemistry, structure, dehydrogenation, and clue for a sodian epidote end-member. American Mineralogist. 99, 157-169
USA
 
  • Colorado
    • Boulder Co.
      • Jamestown District
        • Jamestown
Pavel M. Kartashov analytical data (2014), Philip Persson material
Mineral and/or Locality  
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