Ellestadite
A solid-solution series between two end-member minerals
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About Ellestadite
Name:
The name ellestadite (sensu lato) was first introduced by McConnell (1937) as a name for a rose-pink or orange calcium silicate-sulphate mineral from Crestmore, California, USA. "Ellestadite" was defined as the endmember in the apatite group (sensu lato) that contains SiO44- and SO42- groups, substituting for PO43- group. It was named in honor of Dr. Ruben B. Ellestad (1900-1993), American analytical chemist of Minneapolis. Rouse and Dunn (1982) showed that the Si:S ratio was close to 1:1, giving the formula Ca10(SiO4)3(SO4)3X2, where X represented fluorine (F), hydroxyl (OH) or chlorine (Cl). Based on the original chemical analysis, the type specimen should be considered hydroxylellestadite (Pasero et al., 2010).
Series Formula:
Ca5(SiO4)1.5(SO4)1.5(OH) to Ca5(SiO4)1.5(SO4)1.5F
A series between Hydroxylellestadite and Fluorellestadite
The name ellestadite is (after the new nomenclature of the apatite supergroup, 2010) used as a common name for the series between the OH-dominant (hydroxylellestadite) and the F-dominant species (fluorellestadite), both members of the Ellestadite Group. A chlorine-dominant phase, named ellestadite-(Cl) is rarer. Common labelling for ellestadite group specimens without a determination of the dominant anions.
See also Ellestadite Group in the Apatite Supergroup.
The name ellestadite is (after the new nomenclature of the apatite supergroup, 2010) used as a common name for the series between the OH-dominant (hydroxylellestadite) and the F-dominant species (fluorellestadite), both members of the Ellestadite Group. A chlorine-dominant phase, named ellestadite-(Cl) is rarer. Common labelling for ellestadite group specimens without a determination of the dominant anions.
See also Ellestadite Group in the Apatite Supergroup.
Unique Identifiers
Mindat ID:
1367
Long-form identifier:
mindat:1:1:1367:9
Similar Names
| Ellestadite-(Cl) | A synonym of Chlorellestadite |
| Ellestadite-(F) | A synonym of Fluorellestadite |
| Ellestadite-(OH) | A synonym of Hydroxylellestadite |
Classification of Ellestadite
17.10.19
17 : Silicates Containing other Anions
10 : Silicates with sulphate, molybdate or tungstate
17 : Silicates Containing other Anions
10 : Silicates with sulphate, molybdate or tungstate
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) |
|---|---|---|---|---|---|---|---|
| 0004257 | Hydroxylellestadite | Onac B P, Effenberger H, Ettinger K, Panzaru S P (2006) Hydroxylellestadite from Cioclovina Cave (Romania): Microanalytical, structural, and vibrational spectroscopy data American Mineralogist 91 1927-1931 |  | 2006 | Cioclovina Cave, Sureanu Mountains, Romania | 0 | 293 |
| 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 | |
| 0014857 | Hydroxylellestadite | Hughes J M, Drexler J W (1991) Cation substitution in the apatite tetrahedral site: crystal structures of type hydroxylellestadtite and type fermorite Neues Jahrbuch fur Mineralogie, Monatshefte 1991 327-336 | 1991 | Crestmore, California, USA | 0 | 293 |
CIF Raw Data - click here to close
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-? alteration and/or metamorphism | |
| 31 : Thermally altered carbonate, phosphate, and iron formations | |
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47c : [Carbonates, phosphates, borates, nitrates] | |
| 47g : [Halogen-bearing surface weathering minerals] | |
| 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) |
Other Language Names for Ellestadite
German:Ellestadit
Spanish:Ellestadita
Common Associates
Associations Based on Photo Data:
| 12 photos of Ellestadite associated with Calcite | CaCO3 |
| 11 photos of Ellestadite associated with Tobermorite | Ca5Si6O17 · 5H2O |
| 4 photos of Ellestadite associated with Riversideite | Ca5Si6O16(OH)2 · 2H2O |
| 4 photos of Ellestadite associated with Datolite | CaB(SiO4)(OH) |
| 4 photos of Ellestadite associated with Rondorfite | Ca8Mg(SiO4)4Cl2 |
| 2 photos of Ellestadite associated with Reinhardbraunsite | Ca5(SiO4)2(OH,F)2 |
| 2 photos of Ellestadite associated with Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| 1 photo of Ellestadite associated with Harkerite | Ca48Mg16[AlSi4O15(OH)]4(BO3)16(CO3)16 · 2(H2O,HCl) |
Other Information
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 Ellestadite
mindat.org URL:
https://www.mindat.org/min-1367.html
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References for Ellestadite
Localities for Ellestadite
Showing 113 localities.
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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.
Lapanouse-de-Sévérac slag locality, Sévérac-d'Aveyron, Rodez, Aveyron, Occitanie, France