Florencite-(Ce) (original) (raw)

A valid IMA mineral species - grandfathered

About Florencite-(Ce)Hide

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Colour:

Pale yellow to butterscotch-yellow, red-orange, pink, pale brown, colorless to gray; colorless to pale yellow in thin section, may be zoned.

Specific Gravity:

3.45 - 3.54

Name:

Originally named florencite in honour of Dr. Guilherme (William) Florence (19 June 1864 - 5 October 1942), Brazilian mineralogist with the São Paulo Geographic and Geological Commission. He made a preliminary chemical examination of the mineral. The "-(Ce)" suffix was added in 1987 (Nickel and Mandarino), in allusion to cerium being the dominant REE in the composition.

This page provides mineralogical data about Florencite-(Ce).

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:1560:4

22086fca-ff9d-4242-8f6d-fdae96294953

IMA Classification of Florencite-(Ce)Hide

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Approved, 'Grandfathered' (first described prior to 1959)

Type description reference:

Classification of Florencite-(Ce)Hide

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8.BL.13

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
L : With medium-sized and large cations, (OH, etc.):RO4 = 3:1

41.5.10.2

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)2(XO4)Zq

19.9.10

19 : Phosphates
9 : Phosphates of rare earths and Sc

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 Florencite-(Ce)Hide

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Transparency:

Transparent, Translucent

Colour:

Pale yellow to butterscotch-yellow, red-orange, pink, pale brown, colorless to gray; colorless to pale yellow in thin section, may be zoned.

Cleavage:

Distinct/Good
Good on {0001}; interrupted on {1120}

Fracture:

Splintery, Sub-Conchoidal

Density:

3.45 - 3.54 g/cm3 (Measured) 3.58(11) g/cm3 (Calculated)

Optical Data of Florencite-(Ce)Hide

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RI values:

_n_ω = 1.747 _n_ε = 1.776

δ = 0.029

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

Chemistry of Florencite-(Ce)Hide

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Mindat Formula:

CeAl3(PO4)2(OH)6

Crystallography of Florencite-(Ce)Hide

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Class (H-M):

3_m_ _(_32/m ) - Hexagonal Scalenohedral

Cell Parameters:

a = 6.972(2) Å, c = 16.261(6) Å

Unit Cell V:

684.53 ų (Calculated from Unit Cell)

Crystal StructureHide

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X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Comments:

Matta dos Creoulos, Brazil. ICDD 8-143.

Geological EnvironmentHide

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Type Occurrence of Florencite-(Ce)Hide

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Place of Conservation of Type Material:

National Museum of Natural History, Washington, D.C., USA, R5209.

Reference:

Hussak, E., Prior, G.T. (1900) Florencite, a new hydrated phosphate of aluminium and the cerium earths, from Brazil. Mineralogical Magazine: 12: 244-248.

Synonyms of Florencite-(Ce)Hide

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Other Language Names for Florencite-(Ce)Hide

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Relationship of Florencite-(Ce) to other SpeciesHide

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Other Members of this group:

Common AssociatesHide

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Associated Minerals Based on Photo Data:

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 Florencite-(Ce)Hide

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References for Florencite-(Ce)Hide

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Reference List:

Ghignone, S., Prencipe, M., Manzotti, P., Bruno, M., Boero, F., Borghini, A., Costa, E., Ciriotti, M., Scaramuzzo, E. (2024): The Raman spectrum of florencite-(REE) [REEAl3(PO4)2(OH)6]: an integrated experimental and computational approach. Journal of Raman Spectroscopy, 55, 6640.

**Palache, Charles, Berman, Harry, Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Ect. John Wiley and Sons, New York.**pp.838-839

Schmandt, D.S., Cook, N.J., Ciobanu, C.L., Ehrig, K., Wade, B.P., Gilbert, S., and Kamenetsky, V.S. (2019) Rare earth element phosphate minerals from the Olympic Dam Cu-U-Au-Ag deposit, South Australia: Recognizing temporal-spatial controls on REE mineralogy in an evolved IOCG system. The Canadian Mineralogist, 57, 3-24. [detailed study on florencite-(Ce)]

Localities for Florencite-(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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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.