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Ellestadite-(Cl)

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Formula:
Ca10(SiO4)3(SO4)3Cl2
System:
Hexagonal
Colour:
Pink
Hardness:
A mineral with this ideal end-member formula is assumed not to exist and therefore to be discredited (Pasero et al., 2010), although a synthetic equivalent has been synthesised.

Compare Ellestadite Group.


Classification of Ellestadite-(Cl)

Discredited 2010
9.AH.25

9 : SILICATES (Germanates)
A : Nesosilicates
H : Nesosilicates with CO3, SO4, PO4, etc.
52.4.9.5

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
17.10.20

17 : Silicates Containing other Anions
10 : Silicates with sulphate, molybdate or tungstate
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First Recorded Occurrence of Ellestadite-(Cl)

Year of Discovery:
1982

Physical Properties of Ellestadite-(Cl)

Colour:
Pink
Hardness (Mohs):

Crystallography of Ellestadite-(Cl)

Crystal System:
Hexagonal
Cell Parameters:
a = 9.53Å, c = 6.91Å
Ratio:
a:c = 1 : 0.725
Unit Cell Volume:
V 543.49 ų (Calculated from Unit Cell)

Optical Data of Ellestadite-(Cl)

Type:
Uniaxial (-)
RI values:
nω = 1.652 - 1.655 nε = 1.649 - 1.650
Max Birefringence:
δ = 0.003 - 0.005
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of Ellestadite-(Cl)

Formula:
Ca10(SiO4)3(SO4)3Cl2
Essential elements:
All elements listed in formula:
Common Impurities:
Al,Fe,Mn,Mg,C

Relationship of Ellestadite-(Cl) to other Species

9.AH.05Iimoriite-(Y)Y2[SiO4][CO3]
9.AH.10Tundrite-(Ce)Na2Ce2Ti(SiO4)(CO3)2O2
9.AH.10Tundrite-(Nd)Na2(Nd,Ce)2Ti(SiO4)(CO3)2O2
9.AH.15SpurriteCa5(SiO4)2(CO3)
9.AH.20TernesiteCa5(SiO4)2(SO4)
9.AH.25Britholite-(Ce)Ca2(Ce,Ca)3(SiO4,PO4)3(OH,F)
9.AH.25Britholite-(Y)Ca2(Y,Ca)3(SiO4,PO4)3(OH,F)
9.AH.25Fluorbritholite-(Ce)Ca2(Ce,Ca)3(SiO4,PO4)3(F,OH)
9.AH.25FluorellestaditeCa5(SiO4)1.5(SO4)1.5F
9.AH.25HydroxylellestaditeCa5(SiO4)1.5(SO4)1.5(OH)
9.AH.25MattheddleitePb5(SiO4)1.5(SO4)1.5(Cl,OH)
9.AH.25Tritomite-(Ce)(Ce,La,Y,Th)5(Si,B)3(O,OH,F)13
9.AH.25Tritomite-(Y)(Y,Ca,La,Fe)5(Si,B,Al)3(O,OH,F)13
9.AH.25Fluorcalciobritholite(Ca,Ce)5 (SiO4,PO4)3F
9.AH.25Fluorbritholite-(Y)Ca2(Y,Ca,Ln)3(SiO4,PO4)3(F,OH)
17.10.1NoseanNa8(Al6Si6O24)(SO4) · H2O
17.10.2PitiglianoiteNa6K2(Al6Si6O24)(SO4) · 2H2O
17.10.3Vishnevite(Na,K)8(Al6Si6O24)(SO4,CO3) · 2H2O
17.10.4Haüyne(Na,Ca)4-8(Al6Si6O24)(SO4,S,Cl)1-2
17.10.5Liottite(Na,K)16Ca8(Al6Si6O24)3(SO4)5Cl4
17.10.6Latiumite(Ca,K)4(Si,Al)5O11(SO4,CO3)
17.10.7Tuscanite(K(Ca,Na)6(Si,Al)10O22[SO4,CO3,(OH)2] · H2O
17.10.8MicrosommiteNa4K2Ca2(Al6Si6O24)(SO4)Cl2
17.10.9Delhayelite(Na,K)10Ca5Al6Si32O80(Cl2,F2,SO4)3 · 18H2O
17.10.10HydrodelhayeliteKCa2AlSi7O17(OH)2 · 6H2O
17.10.11Davyne(Na,K)6Ca2(Al6Si6O24)(Cl2,SO4)2
17.10.12Afghanite(Na,Ca,K)8(Al6Si6O24)(Cl2,SO4,CO3)3 · 0.5H2O
17.10.13Franzinite(Na,K)6Ca2(Al6Si6O24)(SO4)2 · 0.5H2O
17.10.14Giuseppettite(Na,K,Ca)7-8(Al6Si6O24)(SO4,Cl)1-2
17.10.15Sacrofanite(Na,K)98Ca20(Al6Si6O24)14(SO4)26Cl2 · 8H2O
17.10.16Chessexite(Na,K)4Ca2(Mg,Zn)3Al8(SO4)10(SiO4)2 · 40H2O
17.10.17InneliteNa2CaBa4Ti3(Si2O7)2(SO4)2O4
17.10.18ThaumasiteCa3(SO4)[Si(OH)6](CO3) · 12H2O
17.10.19Ellestadite
17.10.21HydroxylellestaditeCa5(SiO4)1.5(SO4)1.5(OH)
17.10.22FluorellestaditeCa5(SiO4)1.5(SO4)1.5F
17.10.23MattheddleitePb5(SiO4)1.5(SO4)1.5(Cl,OH)
17.10.24QueititePb4Zn2(SO4)(SiO4)(Si2O7)
17.10.25RoeblingitePb2Ca6Mn2+(Si3O9)2(SO4)2(OH)2 · 4H2O
17.10.26YoshimuraiteBa2Mn2Ti(Si2O7)(PO4)O(OH)
17.10.27KegelitePb8Al4(Si8O20)(SO4)2(CO3)4(OH)8
17.10.28Wenkite(Ba,K)4(Ca,Na)6[(SO4)3|(Si,Al)20O39(OH)2] · 0.5H2O
17.10.29MacquartiteCu2Pb7(CrO4)4(SiO4)2(OH)2
17.10.30WeliniteMn62+(W6+,Mg)2(SiO4)2(O,OH)6

Other Names for Ellestadite-(Cl)

Name in Other Languages:

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.

References for Ellestadite-(Cl)

Reference List:
American Mineralogist (1982): 67: 90-96.

Jegou Saint-Jean, Simon; Hansen, Staffan (2005): Nonstoichiometry in chlorellestadite. Solid State Sciences 7, 97-102.

Pasero, M., Kampf, A. R., Ferraris, C., Pekov, I. V., Rakovan, J. and White, T. J. (2010): Nomenclature of the apatite supergroup minerals. European Journal of Mineralogy 22, 163-179.

Internet Links for Ellestadite-(Cl)

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