Fluorellestadite
A valid IMA mineral species
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About Fluorellestadite
Formula:
Ca5(SiO4)1.5(SO4)1.5F
Colour:
Blue to pale bluish, light rose-red, yellow
Lustre:
Vitreous, Greasy
Hardness:
4½
Specific Gravity:
3.03
Crystal System:
Hexagonal
Member of:
Name:
In allusion to its composition, being the fluorine-dominant analogue of hydroxylellestadite. Named in honor of Dr. Ruben B. Ellestad (1900-1993), American analytical chemist of Minneapolis, and fluorine in the chemical composition. First described as a new mineral from Kopeisk, South Urals, Russia by Chesnokov et al. 1987). The name was originally fluorellestadite, changed to ellestadite-(F) by the IMA in 2008, and back to fluorellestadite by the IMA in 2010.
A mineral in the Ellestadite Group of the Apatite Supergroup. Formerly called ellestadite-(F). It is a relatively rare mineral found in calcsilicate skarns or metamorphosed limestones. It is also known from burned coal dumps.
The fluorine analogue of hydroxylellestadite.
The fluorine analogue of hydroxylellestadite.
Unique Identifiers
Mindat ID:
1575
Long-form identifier:
mindat:1:1:1575:8
GUID
(UUID V4):
(UUID V4):
bf8079b3-d878-4e7f-9491-b0974be7d275
IMA Classification of Fluorellestadite
Approved
Approval year:
1987
First published:
1987
Classification of Fluorellestadite
9.AH.25
9 : SILICATES (Germanates)
A : Nesosilicates
H : Nesosilicates with CO3, SO4, PO4, etc.
9 : SILICATES (Germanates)
A : Nesosilicates
H : Nesosilicates with CO3, SO4, PO4, etc.
52.4.9.3
52 : NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
4 : Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
52 : NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
4 : Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
17.10.22
17 : Silicates Containing other Anions
10 : Silicates with sulphate, molybdate or tungstate
17 : Silicates Containing other Anions
10 : Silicates with sulphate, molybdate or tungstate
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference |
|---|---|---|
| Fel | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Fel | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of Fluorellestadite
Vitreous, Greasy
Transparency:
Transparent, Translucent
Colour:
Blue to pale bluish, light rose-red, yellow
Comment:
At the TL thin needles are colorless
Streak:
White streak with a weak bluish tint
Hardness:
4½ on Mohs scale
Tenacity:
Very brittle
Cleavage:
Imperfect/Fair
On {0001}, imperfect.
On {0001}, imperfect.
Fracture:
Conchoidal
Density:
3.03(1) g/cm3 (Measured) 3.090 g/cm3 (Calculated)
Optical Data of Fluorellestadite
Type:
Uniaxial (-)
RI values:
nω = 1.655 nε = 1.650
Birefringence:
0.005
Max Birefringence:
δ = 0.005
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Optical Extinction:
Parallel
Chemistry of Fluorellestadite
Mindat Formula:
Ca5(SiO4)1.5(SO4)1.5F
Common Impurities:
Al,Fe,Mn,Mg,Na,K
Crystallography of Fluorellestadite
Crystal System:
Hexagonal
Class (H-M):
6/m - Dipyramidal
Space Group:
P63/m
Cell Parameters:
a = 9.53 Å, c = 6.91 Å
Ratio:
a:c = 1 : 0.725
Unit Cell V:
543.49 ų (Calculated from Unit Cell)
Morphology:
Needles, as hexagonal prismatic, poorly terminated crystals up to 3 mm long, and as fine-grained aggregates.
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0015322 | Fluorellestadite | Pajares I, De la Torre A G, Martinez-Ramirez S, Puertas F, Blanco-Varela M T, Aranda M A G (2002) Quantitative analysis of mineralized white Portland clinkers: The structure of fluorellestadite Powder Diffraction 17 281-286 | 2002 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.46 Å | (30) |
| 3.13 Å | (20) |
| 2.86 Å | (100) |
| 2.80 Å | (40) |
| 2.76 Å | (60) |
| 2.66 Å | (30) |
| 2.57 Å | (5) |
| 2.33 Å | (5) |
| 2.30 Å | (30) |
| 2.16 Å | (10) |
| 2.07 Å | (5) |
| 1.97 Å | (60) |
| 1.91 Å | (20) |
| 1.86 Å | (60) |
| 1.83 Å | (30) |
| 1.81 Å | (30) |
| 1.78 Å | (30) |
| 1.73 Å | (30) |
| 1.66 Å | (10) |
| 1.56 Å | (5) |
| 1.55 Å | (5) |
| 1.51 Å | (5) |
| 1.49 Å | (20) |
| 1.47 Å | (30) |
| 1.45 Å | (20) |
Comments:
ICDD 3-708
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-𝑇 alteration and/or metamorphism | |
| 31 : Thermally altered carbonate, phosphate, and iron formations | |
| Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere | <0.6 |
| 50 : Coal and/or oil shale minerals | <0.36 |
| Stage 10b: Anthropogenic minerals | <10 Ka |
| 54 : Coal and other mine fire minerals (see also #51 and #56) |
Type Occurrence of Fluorellestadite
Co-Type Localities:
General Appearance of Type Material:
Needles, as hexagonal prismatic, poorly terminated crystals up to 3 mm long, and as fine-grained aggregates.
Place of Conservation of Type Material:
In the Fersman Mineralogical Museum, Moscow, Russia.
Geological Setting of Type Material:
In burned fragments of petrified wood in coal dumps
Associated Minerals at Type Locality:
Reference:
Chesnokov, B. V., Bazhenova, L. F, Bushmakin, A. F. (1987) Fluorellestadite Ca10[(SO4),(SiO4)]6F2 — a new mineral. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 116 (6): 743-746.
Synonyms of Fluorellestadite
Other Language Names for Fluorellestadite
German:Fluorellestadit
Wilkeit
Wilkeit
Russian:Зллестадит-(F)
Simplified Chinese:硅硫磷灰石
Spanish:Fluorellestadita
Wilkeita
Wilkeita
Varieties of Fluorellestadite
| Wilkeite | Now a discredited mineral. A note on specimens labelled as wilkeite from the first recorded locality, Crestmore quarries, California, USA: The type material was described as pink hexagonal crystals in blue crystalline limestone from Riverside Co., Cali... |
Relationship of Fluorellestadite to other Species
Member of:
Other Members of this group:
| Chlorellestadite | Ca5(SiO4)1.5(SO4)1.5Cl | Hex. 6/m : P63/m |
| Hydroxylellestadite | Ca5(SiO4)1.5(SO4)1.5(OH) | Hex. 6/mmm (6/m 2/m 2/m) : P63/mcm |
| Mattheddleite | Pb5(SiO4)1.5(SO4)1.5(Cl,OH) | Hex. 6/m : P63/m |
Forms a series with:
Common Associates
Associated Minerals Based on Photo Data:
| 20 photos of Fluorellestadite associated with Calcite | CaCO3 |
| 8 photos of Fluorellestadite associated with Ettringite | Ca6Al2(SO4)3(OH)12 · 26H2O |
| 5 photos of Fluorellestadite associated with Srebrodolskite | Ca2Fe3+2O5 |
| 4 photos of Fluorellestadite associated with Magnesioferrite | MgFe3+2O4 |
| 3 photos of Fluorellestadite associated with Rittmannite | {(Mn2+,Ca)}{Mn2+}{(Fe2+,Mn2+,Mg)2}{(Al,Fe3+)2}(PO4)4(OH)2 · 8H2O |
| 2 photos of Fluorellestadite associated with Aragonite | CaCO3 |
| 2 photos of Fluorellestadite associated with Magnetite | Fe2+Fe3+2O4 |
| 2 photos of Fluorellestadite associated with Andradite | Ca3Fe3+2(SiO4)3 |
| 2 photos of Fluorellestadite associated with Cuspidine | Ca8(Si2O7)2F4 |
| 2 photos of Fluorellestadite associated with Hematite | Fe2O3 |
Related Minerals - Strunz-mindat Grouping
| 9.AH. | Fluorbritholite-(Nd) | Ca2Nd3(SiO4)3F |
| 9.AH.05 | Iimoriite-(Y) | Y2[SiO4][CO3] |
| 9.AH.10 | Tundrite-(Ce) | Na2Ce2Ti(SiO4)(CO3)2O2 |
| 9.AH.10 | Tundrite-(Nd) | Na2(Nd,Ce)2Ti(SiO4)(CO3)2O2 |
| 9.AH.15 | Spurrite | Ca5(SiO4)2(CO3) |
| 9.AH.15 | Galuskinite | Ca7(SiO4)3(CO3) |
| 9.AH.20 | Ternesite | Ca5(SiO4)2(SO4) |
| 9.AH.20 | Silicocarnotite | Ca5[(SiO4)(PO4)](PO4) |
| 9.AH.25 | Britholite-(Ce) | (Ce,Ca)5(SiO4)3OH |
| 9.AH.25 | Britholite-(Y) | (Y,Ca)5(SiO4)3OH |
| 9.AH.25 | Chlorellestadite | Ca5(SiO4)1.5(SO4)1.5Cl |
| 9.AH.25 | Fluorbritholite-(Ce) | (Ce,Ca)5(SiO4)3F |
| 9.AH.25 | Hydroxylellestadite | Ca5(SiO4)1.5(SO4)1.5(OH) |
| 9.AH.25 | Mattheddleite | Pb5(SiO4)1.5(SO4)1.5(Cl,OH) |
| 9.AH.25 | Tritomite-(Ce) | Ce5(SiO4,BO4)3(OH,O) |
| 9.AH.25 | Tritomite-(Y) | Y5(SiO4,BO4)3(O,OH,F) |
| 9.AH.25 | Fluorcalciobritholite | (Ca,REE)5(SiO4,PO4)3F |
| 9.AH.25 | Fluorbritholite-(Y) | (Y,Ca)5(SiO4)3F |
| 9.AH.25 | Britholite-(La) | Ca2(La,Ce,Ca)3(SiO4,PO4)3(OH,F) |
| 9.AH.25 | Calciobritholite | (Ca,Y)5(SiO4,PO4)3(OH) |
| 9.AH.35 | Nabimusaite | KCa12(SiO4)4(SO4)2O2F |
| 9.AH.35 | Dargaite | BaCa12(SiO4)4(SO4)2O3 |
| 9.AH.40 | Zadovite | BaCa6[(SiO4)(PO4)](PO4)2F |
| 9.AH.40 | Gazeevite | BaCa6(SiO4)2(SO4)2O |
| 9.AH.40 | Stracherite | BaCa6(SiO4)2[(PO4)(CO3)]2F |
| 9.AH.45 | Flamite | Ca8-x(Na,K)x(SiO4)4-x(PO4)x |
| 9.AH.50 | Byzantievite | Ba5(Ca,REE,Y)22(Ti,Nb)18(SiO4)4[(PO4),(SiO4)]4(BO3)9O22[(OH),F]43(H2O)1.5 |
| 9.AH.55 | Greenwoodite | (Ba,V3+O)2V3+9(Fe3+,Fe2+)2Si2O22 |
| 9.AH.60 | Kihlmanite-(Ce) | Ce2TiO2(SiO4)(HCO3)2(H2O) |
| 9.AH.65 | Tsangpoite | Ca5(PO4)2(SiO4) |
| 9.AH.70 | Enalite | (Th,REE,Al) [(PO4),(SiO4),(OH)] |
Fluorescence of Fluorellestadite
No luminescence in ultraviolet light (360 nm)
Other Information
Notes:
Soluble and weakly effervescent in HCl, leaving a silica residuum that retains the original form.
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 Fluorellestadite
mindat.org URL:
https://www.mindat.org/min-1575.html
Please feel free to link to this page.
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References for Fluorellestadite
Reference List:
Burke, Ernst A. J. (2008) Tidying up mineral names: an IMA-CNMNC scheme for suffixes, hyphens and diacritical marks. The Mineralogical Record, 39 (2) 131-135
Pasero, Marco, Kampf, Anthony R., Ferraris, Cristiano, Pekov, Igor V., Rakovan, John, White, Timothy J. (2010) Nomenclature of the apatite supergroup minerals. European Journal of Mineralogy, 22 (2) 163-179 doi:10.1127/0935-1221/2010/0022-2022
Avdontceva, Margarita S., Zolotarev, Andrey A., Krivovichev, Sergey V., Krzhizhanovskaya, Maria G., Sokol, Ella V., Kokh, Svetlana N., Bocharov, Vladimir N., Rassomakhin, Mikhail A., Zolotarev, Anatoly A. (2021) Fluorellestadite from burned coal dumps: crystal structure refinement, vibrational spectroscopy data and thermal behavior. Mineralogy and Petrology, 115 (3) 271-281 doi:10.1007/s00710-021-00740-4
Localities for Fluorellestadite
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Canada | |
| GOLD et al. (1986) |
China | |
| Zhengmin Cao and Weijiong Zhu (1993) |
Czech Republic | |
| Hršelová et al. (2013) |
France | |
| Eytier J.R. & Ch. et al. (2004) |
Georgia | |
| Galuskina et al. (2015) |
Germany | |
| Skrzyńska et al. (2023) |
| Hamm (1985) |
| Galuskin et al. (2016) | |
| in the collection of Christof Schäfer | |
| T. Witzke & F. Rüger: Lapis 1998 (7/8) |
| www.mineralienatlas.de (2009) +1 other reference | |
Hungary | |
| Kovács et al. (2003) |
Israel | |
| Kahlenberg et al. (2019) |
| Krüger +2 other references | |
| Bartura et al. (1974) |
| Galuskina et al. (2017) |
| Galuskin et al. (2016) +1 other reference | |
Italy | |
| Russo et al. (2022) |
| Cavarretta et al. (1987) |
| Stoppa et al. (2019) |
| Stoppa et al. (2019) |
Japan | |
| Yamada (2004) |
Jordan | |
| Khoury et al. (2015) +2 other references |
| Sokol +9 other references | |
| Khoury et al. (1985) |
Mexico | |
| stratigraphy et al. (4) +1 other reference |
Middle East | |
| Vapnik et al. (2006) | |
Palestine | |
| Galuskina et al. (2019) |
| Seryotkin Y.V. +1 other reference |
| Galuskina et al. (2014) |
Poland | |
| Ciesielczuk (2008) |
| Ł. Kruszewski PXRD and EPMA data |
Portugal | |
| Schnorrer-Köhler (1991) |
Russia | |
| Sharygin (2015) |
| Zateeva et al. (2007) | |
| Cesnokov et al. (1998) | |
| Cesnokov et al. (1998) | |
| Chesnokov et al. (1987) +1 other reference |
| Avdontceva et al. (2021) |
| Avdontceva et al. (2021) |
Slovakia | |
| Koděra P. et al. (štiavnický stratovulkán) |
Ukraine | |
| Шарыгин (2015) |
USA | |
| Van Nostrand Reinholt Press: 316. +1 other reference |
| Eakle (1914) |
| Woodford et al. (1941) |
| Woodford et al. (1941) | |
| Woodford et al. (1941) | |
| Van Nostrand Reinholt Press: 316 +3 other references |
| Identification by Sidney A. Williams |
| Contrib. Mineral. Petrol. 74 (1980) |
Zambia | |
| Cech et al. (1973) +1 other reference |
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Caspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany