Perbøeite-(Ce) (original) (raw)

A valid IMA mineral species

Formula:

CaCe3(AlAl2Fe2+)[Si2O7][SiO4]3O(OH)2

Colour:

Grayish-green to very pale green

Specific Gravity:

4.474 (Calculated)

Crystal System:

Monoclinic

Name:

Named after the Norwegian mineralogist Per Bøe (1937-), conservator at the Tromsø University museum.

Co-Type Localities:

ⓘ Nedre Eivollen, Eivollen, Drag, Hamarøy, Nordland, Norway
ⓘ Hundholmen, Narvik, Nordland, Norway
ⓘ Stetind pegmatite, Narvik, Nordland, Norway

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.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:42352:6

9c82f707-5a2e-4070-a4d7-7575c64fbb8f

IMA Classification of Perbøeite-(Ce)Hide

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IMA Formula:

(CaCe3)(Al3Fe2+)(Si2O7)(SiO4)3O(OH)2

Type description reference:

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-tornebohmite polysomatic series: Chemistry, structure, dehydrogenation, and clue for a sodian epidote end-member. American Mineralogist, 99 (1) 157-169 doi:10.2138/am.2014.4593

Classification of Perbøeite-(Ce)Hide

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9.BG.50

9 : SILICATES (Germanates)
B : Sorosilicates
G : Sorosilicates with mixed SiO4 and Si2O7 groups; cations in octahedral [6] and greater coordination

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Physical Properties of Perbøeite-(Ce)Hide

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Colour:

Grayish-green to very pale green

Cleavage:

Distinct/Good
{100} good, {001} imperfect

Fracture:

Irregular/Uneven

Density:

4.474 g/cm3 (Calculated)

Optical Data of Perbøeite-(Ce)Hide

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RI values:

_n_α = 1.788(2) _n_β = 1.793(2) _n_γ = 1.820(5)

δ = 0.032

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Comments:

colorless, grayish blue

Chemistry of Perbøeite-(Ce)Hide

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Mindat Formula:

CaCe3(AlAl2Fe2+)[Si2O7][SiO4]3O(OH)2

Crystallography of Perbøeite-(Ce)Hide

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Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

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

Morphology:

Sub- to euhedral Gatelite-like crystals, up to 400 μm in size.

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Type Occurrence of Perbøeite-(Ce)Hide

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Co-Type Localities:

ⓘ Nedre Eivollen, Eivollen, Drag, Hamarøy, Nordland, Norway
ⓘ Hundholmen, Narvik, Nordland, Norway
ⓘ Stetind pegmatite, Narvik, Nordland, Norway

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

Empirical Formula of Type Material:

(Ca1.00Mn0.03Na0.08La0.51Ce1.30Pr0.16Nd0.62Sm0.10Gd0.06Dy0.03 Er0.01Y0.06Th0.01)Σ3.97 (Al3.21Fe2+0.79)Σ4.00Si5.01O20(OH)2

Geological Setting of Type Material:

In yttrian fluorite from pegmatites of the Tysfjord granite, Norway.

Associated Minerals at Type Locality:

Reference:

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.

Synonyms of Perbøeite-(Ce)Hide

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Relationship of Perbøeite-(Ce) to other SpeciesHide

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Other Members of this group:

Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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Health Risks:

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

Internet Links for Perbøeite-(Ce)Hide

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References for Perbøeite-(Ce)Hide

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Reference List:

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-tornebohmite polysomatic series: Chemistry, structure, dehydrogenation, and clue for a sodian epidote end-member. American Mineralogist, 99 (1) 157-169 doi:10.2138/am.2014.4593

Localities for Perbøeite-(Ce)Hide

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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

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