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Light orange; Pink, Purple-grey
Crystal System:
Ellestadite (sensu lacto) was first described and named in honor of Dr. Ruben B. Ellestad (1900-1993), American analytical chemist of Minneapolis. Based on the chemical analysis, the type specimen of ellestadite should be considered a hydroxylellestadite (Pasero et al. 2010). Later Harada et al. (1971) described hydroxylellestadite. It was renamed as ellestadite-(OH), and again, by IMA 2010 (Pasero et al. 2010) back to hydroxylellestadite. The crystal structure was refined, first by Sudarsanan (1980), Hughes & Drexler (1991) and later by Onac et al. (2006).
A mineral in the Ellestadite Group of the Apatite Supergroup. Fluorellestadite-Hydroxylellestadite Series; Hydroxylapatite-hydroxylellestadite series. The hydroxyl analogue of fluorellestadite.

Formerly called ellestadite-(OH).

It is found in pegmatite veins, skarn and pyrometamorphic deposits.

Sulfate may be substituted by carbonate, at least in part, to give Unnamed (CO3 analogue of hydroxylellestadite) if the 50% rule is met.

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Classification of HydroxylellestaditeHide

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

9 : SILICATES (Germanates)
A : Nesosilicates
H : Nesosilicates with CO3, SO4, PO4, etc.

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 : Silicates Containing other Anions
10 : Silicates with sulphate, molybdate or tungstate

Physical Properties of HydroxylellestaditeHide

Transparent, Translucent
Light orange; Pink, Purple-grey
4½ on Mohs scale

Optical Data of HydroxylellestaditeHide

Uniaxial (-)
RI values:
nω = 1.654 nε = 1.650
Max Birefringence:
δ = 0.004
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:

Chemical Properties of HydroxylellestaditeHide

IMA Formula:
Common Impurities:

Crystallography of HydroxylellestaditeHide

Crystal System:
Class (H-M):
6/mmm (6/m 2/m 2/m) - Dihexagonal Dipyramidal
Space Group:
P63/m 2/c 2/m
Cell Parameters:
a = 9.491 Å, c = 6.921 Å
a:c = 1 : 0.729
Unit Cell V:
6.921 ų
Anhedral masses.

Type Occurrence of HydroxylellestaditeHide

General Appearance of Type Material:
Anhedral, cleavable aggregates up to 100 kg. Individual cleavage pieces are up
to 2 cm along the c axis

Synonyms of HydroxylellestaditeHide

Other Language Names for HydroxylellestaditeHide

Relationship of Hydroxylellestadite to other SpeciesHide

Other Members of this group:
ChlorellestaditeCa5(SiO4)1.5(SO4)1.5ClHex. 6/m : P63/m
MattheddleitePb5(SiO4)1.5(SO4)1.5(Cl,OH)Hex. 6/m : P63/m
Forms a series with:

Common AssociatesHide

Associated Minerals Based on Photo Data:
Ye'elimite1 photo of Hydroxylellestadite associated with Ye'elimite on
Plombièrite1 photo of Hydroxylellestadite associated with Plombièrite on

Related Minerals - Nickel-Strunz GroupingHide

9.AH.10Tundrite-(Ce)Na2Ce2Ti(SiO4)(CO3)2O2Tric. 1 : P1
9.AH.20TernesiteCa5(SiO4)2(SO4)Orth. mmm (2/m 2/m 2/m) : Pnma
9.AH.25Britholite-(Ce)(Ce,Ca)5(SiO4)3OHHex. 6/m : P63/m
9.AH.25Britholite-(Y)(Y,Ca)5(SiO4)3OHHex. 6/m : P63/m
9.AH.25ChlorellestaditeCa5(SiO4)1.5(SO4)1.5ClHex. 6/m : P63/m
9.AH.25Fluorbritholite-(Ce)(Ce,Ca)5(SiO4)3FHex. 6/m : P63/m
9.AH.25MattheddleitePb5(SiO4)1.5(SO4)1.5(Cl,OH)Hex. 6/m : P63/m
9.AH.25Fluorcalciobritholite(Ca,REE)5(SiO4,PO4)3FHex. 6/m : P63/m
9.AH.25Fluorbritholite-(Y)(Y,Ca)5(SiO4)3FHex. 6/m : P63/m

Related Minerals - Dana Grouping (8th Ed.)Hide,Ca)5(SiO4)3OHHex. 6/m : P63/m,Ca)5(SiO4)3OHHex. 6/m : P63/m 6/m : P63/m,OH)Hex. 6/m : P63/m,La,Th)(Ti,Nb)(Al,Fe)(Si2O7)(OH)4 · 3H2O,Ca)5(SiO4)3FHex. 6/m : P63/m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

17.10.1NoseanNa8(Al6Si6O24)(SO4) · H2OIso. 4 3m : P4 3n
17.10.2PitiglianoiteNa6K2(Al6Si6O24)(SO4) · 2H2OHex.
17.10.3Vishnevite(Na,K)8(Al6Si6O24)(SO4,CO3) · 2H2OHex. 6 : P63
17.10.4Haüyne(Na,K)3(Ca,Na)(Al3Si3O12)(SO4,S,Cl)Iso. 4 3m : P4 3n
17.10.7Tuscanite(K(Ca,Na)6(Si,Al)10O22[SO4,CO3,(OH)2] · H2OMon.
17.10.9Delhayelite(Na,K)10Ca5Al6Si32O80(Cl2,F2,SO4)3 · 18H2OOrth.
17.10.10HydrodelhayeliteKCa2AlSi7O17(OH)2 · 6H2OOrth.
17.10.11Davyne(Na,K)6Ca2(Al6Si6O24)(Cl2,SO4)2Hex. 6/m : P63/m
17.10.12Afghanite(Na,K)22Ca10(Si24Al24O96)(SO4)6Cl6Trig. 3m : P3 1c
17.10.13Franzinite(Na,K)6Ca2(Al6Si6O24)(SO4)2 · 0.5H2OHex.
17.10.16Chessexite(Na,K)4Ca2(Mg,Zn)3Al8(SO4)10(SiO4)2 · 40H2OOrth.
17.10.17InneliteNa2CaBa4Ti3(Si2O7)2(SO4)2O4Tric. 1 : P1
17.10.18ThaumasiteCa3(SO4)[Si(OH)6](CO3) · 12H2OHex. 6 : P63
17.10.20ChlorellestaditeCa5(SiO4)1.5(SO4)1.5ClHex. 6/m : P63/m
17.10.23MattheddleitePb5(SiO4)1.5(SO4)1.5(Cl,OH)Hex. 6/m : P63/m
17.10.24QueititePb4Zn2(SO4)(SiO4)(Si2O7)Mon. 2 : P21
17.10.25RoeblingitePb2Ca6Mn2+(Si3O9)2(SO4)2(OH)2 · 4H2OMon. 2/m : B2/m
17.10.26YoshimuraiteBa2Mn2Ti(Si2O7)(PO4)O(OH)Tric. 1 : P1
17.10.28Wenkite(Ba,K)4(Ca,Na)6[(SO4)3|(Si,Al)20O39(OH)2] · 0.5H2OHex.
17.10.30WeliniteMn2+6(W6+,Mg)2(SiO4)2(O,OH)6Trig. 3 : P3

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 HydroxylellestaditeHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Harda, K., Nagashima, K., Nakao, K., Kato, A. (1971) Hydroxylellestadite, a new apatite from Chichibu Mine, Saitama Prefecture, Japan. American Mineralogist: 56: 1507-1518.
Suddarsanan, K. (1980): Structure of hydroxylellestadite. acta Crystallographica. B36: 1636-1639
Rouse, R.C., Dunn, P.J. (1982) A contribution to the crystal chemistry of ellestadite and silicate sulfate apatites. American Mineralogist: 67: 90-96.
Hughes, J.M., Drexler, J.W. (1991) Cation substitution in the apatite tetrahedral site: crystal structures of type hydroxylellestadite and type fermorite. Neues Jahrbuch für Mineralogie, Monatshefte: 1991: 327-336.
Onac, B.P., Effenberger, H., Ettinger, K., Panzaru, S.C. (2006) Hydroxylellestadite from Cioclovina Cave (Romania): microanalytical, structural, and vibrational spectroscopy data. American Mineralogist: 91: 1927-1931.
Pasero, M., Kampf, A.R., Ferraris, C., Pekov, I.V., Rakovan, J.R., White, T.J. (2010) Nomenclature of the apatite supergroup minerals. European Journal of Mineralogy: 22: 163-179. [doi:10.1127/0935-1221/2010/0022-2022]
Hughes, J.M., Rakovan, J.F. (2015) Structurally robust, chemically diverse: Apatite and apatite supergroup minerals. Elements: 11(3): 165-170.

Internet Links for HydroxylellestaditeHide

Localities for HydroxylellestaditeHide

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.
  • Anhui Province
Shengxiu Hou, Zhaolian Liu, and Huande Hu (1985): Acta Mineralogica Sinica 5(4), 327-330
  • Cienfuegos Province
Лицарев М.А. и др. Гидроксилэллестадит из гранат-волластонитовых скарнов Аримао-Норте (Куба), //Записки ВМО, 1998, N6, c.68-75.
Czech Republic
  • Moravia (Mähren; Maehren)
    • South Moravia Region
      • Oslavany
Hršelová, P., Cempírek, J., Houzar, S., Sejkora, J. (2013): S,F,Cl-rich mineral assemblages from burned spoil heaps in the Rosice-Oslavany coalfield, Czech Republic. Can. Mineral.: 51(1): 171-188
  • Provence-Alpes-Côte d'Azur
    • Alpes-de-Haute-Provence
Favreau G., Meisser N., Chiappero P.J. (2004), Saint-Maime (Alpes-de-Haute-Provence): un exemple de pyrométamorphisme en région provençale, n°3, pp: 59-92
  • Thuringia
    • Gera
      • Ronneburg U deposit
T. Witzke & F. Rüger: Lapis 1998(7/8), 26-64
Japan (TL)
  • Honshu Island
    • Kanto Region
      • Saitama Prefecture
        • Chichibu City
          • Ohtaki-mura
            • Nakatsugawa
Harda, K., Nagashima, K., Nakao, K., Kato, A. (1971) Hydroxylellestadite, a new apatite from Chichibu Mine, Saitama Prefecture, Japan. American Mineralogist: 56: 1507-1518 Am.Min.:67:90 (1982); Acta Cryst. B36(1980).
Yamada, S. (2004) Nihonsan-koubutsu Gojuon-hairetsu Sanchi-ichiranhyou (111 pp.)
Yamada, S. (2004) Nihonsan-koubutsu Gojuon-hairetsu Sanchi-ichiranhyou (111 pp.)
  • West Bank
    • Hatrurim Formation
Sokol, E.V., Gaskova, O.L., Kokh, S.N., Kozmenko, O.A., Seryotkin, Y.V., Vapnik, Y., Murashko, M.N. (2011): Chromatite and its Cr3+- and Cr6+-bearing precursor minerals from the Nabi Musa Mottled Zone complex, Judean Desert. American Mineralogist 96, 659-674.
  • Guarda District
    • Sabugal
      • Bendada
Schnorrer-Köhler (1991), Mineral Occurrences.
  • Caraş-Severin Co.
    • Banat Mts
Marincea, S., Dumitraş. D-G., Ghinet, C, Fransolet, A.-M., Hatert, F. & Rondeaux, M. (2011): Gehlenite from three occurrences of high-temperature skarns, Romania: new mineralogical data. Canadian Mineralogist. 49, 1001-1014
  • Hunedoara Co.
    • Brad
The Canadian Mineralogist Vol. 39, pp. 1405-1434 (2001)
    • Hunedoara
      • Boșorod
Onac, B.P., et al. (2006). American Mineralogist: 91: 1927-1931.
Marincea, Ş., Bilal, E., Verkaeren, J., Pascal, M.-L., and Fonteilles, M. (2001) Superposed paragenesis in spurrite-, tilleyite- and gehlenite-bearing skarns from Cornet Hill, Apuseni Mountains, Romania. Canadian Mineralogist: 39: 1435-1453.; The Canadian Mineralogist Vol. 39, pp. 1405-1434 (2001); Marincea, Ş., Dumitraş, D. G., Călin, N., Anason, A. M., Fransolet, A. M., & Hatert, F. (2013). Spurrite, tilleyite and associated minerals in the exoskarn zone from Cornet Hill (Metaliferi Massif, Apuseni Mountains, Romania). The Canadian Mineralogist, 51(3), 359-375.
  • Eastern-Siberian Region
    • Transbaikalia (Zabaykalye)
      • Buriatia Republic (Buryatia)
        • Dovyren Highlands
American Mineralogist, Volume 94, pages 323–333, 2009
  • Northern Caucasus Region
    • Kabardino-Balkarian Republic
      • Baksan Valley
Galuskin, E.V., Galuskina, I.O., Kusz, J., Gfeller, F., Armbruster, T., Bailau, R., Dulski, M., Gazeev, V.M., Pertsev, N.N., Zadov, A.E., Dzieržanowski, P. (2015): Mayenite supergroup, part II: Chlorkyuygenite from Upper Chegem, northern Caucasus Kabardino-Balkaria, Russia, a new microporous mayenite supergroup mineral with “zeolitic” H2O. European Journal of Mineralogy. 27, 113-122; Bailau, R., Gałuskin, E. V., Gazeev, V. M., & Gałuskina, I. O. Raman investigation of potential new mineral-Fe 3-analogue of wadalite from calcareous-silicate xenoliths of the Upper Chegem caldera, Northern Caucasus, Russia.
          • Lakargi Mt.
Galuskina, I. O., Galuskin, E. V., Kusz, J., Dzierżanowski, P., Prusik, K., Gazeev, V. M., ... & Dubrovinsky, L. (2013). Dzhuluite, Ca3SbSnFe3+ 3O12, a new bitikleite-group garnet from the Upper Chegem Caldera, Northern Caucasus, Kabardino-Balkaria, Russia. European Journal of Mineralogy, 25(2), 231-239
Galuskin, E.V., Galuskina, I.O., Gazeev, V.M., Dzierżanowski, P., Prusik, K., Pertsev, N.N., Zadov, A.E., Bailau, R., Gurbanov, A.G. (2011): Megawite, CaSnO3: a new perovskite-group mineral from skarns of the Upper Chegem caldera, Kabardino-Balkaria, Northern Caucasus, Russia. Mineralogical Magazine, 75, 2563-2572.
  • Urals Region
    • Middle Urals
      • Sverdlovskaya Oblast'
        • Sysert' District
          • Polevskoi (Polevskoi Zavod)
Zadov, A. E.; Grabezhev, A. I.; Pertsev, N. N.; Chukanov, N. V.; Pribavkin, S. V. (2006): Tobermorite-plombierite metasomatites of the Gumeshevsk skarn-porphyry copper deposit, Middle Urals. Doklady Earth Sciences 407A, 495-497. ; American Mineralogist, Volume 94, pages 323–333, 2009; Grabezhev, A. I., Pertsev, N. N., Zadov, A. E., Pribavkin, S. V., & Murzin, V. V. (2007). Calcic hydrosilicate metasomatic rocks at the Gumeshevsk skarn-porphyry copper deposit in the central Urals, Russia. Petrology, 15(5), 514-522.
  • Banská Bystrica Region
    • Banská Štiavnica Co.
      • Vysoká
Koděra P., Uher P., Ozdín D., Kollárová V., Lexa J., 2009: Monticellit, clintonit a hydroxylellestadit-fluorellestadit: vzácne skarnové minerály na Cu-Au porfýrovo-skarnovom ložisku Vysoká – Zlatno (štiavnický stratovulkán). Mineralia Slovaca, 41, 2, 169-178.; P. UHER, P. KODĚRA, T. VACULOVIČ (2011): Perovskite from Ca-Mg skarn-porphyry deposit Vysoká – Zlatno, Štiavnica stratovolcano, Slovakia. Mineralia Slovaca, 43, 247-254.
  • California
    • Riverside Co.
      • Crestmore
RRUFF ID: R060769
      • Jurupa Valley
        • Jurupa Mts
Excalibur Mineral Company analysis
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