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Ellestadite-(Cl) Mineral Data

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General Ellestadite-(Cl) Information

Help on Chemical  Formula: Chemical Formula: Ca5(SiO4,PO4,SO4)3(Cl,OH,F)
Help on Composition: Composition: Molecular Weight = 511.78 gm
   Calcium     39.16 %  Ca   54.79 % CaO
   Silicon      5.49 %  Si   11.74 % SiO2
   Phosphorus   6.05 %  P    13.87 % P2O5
   Hydrogen     0.06 %  H     0.53 % H2O
   Sulfur       6.27 %  S    15.64 % SO3
   Chlorine     4.16 %  Cl    4.16 % Cl
                 -   %   Cl   -0.94 % -O=Cl2   
   Oxygen      38.45 %  O
   Fluorine     0.37 %  F     0.37 % F
                 -   %   F    -0.16 % -O=F2    
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca5(SiO4)(PO4)(SO4)Cl0.6(OH)0.3F0.1
Help on Environment: Environment: In a skarn.
Help on IMA Status: IMA Status: Approved IMA 1982
Help on Locality: Locality: Takiue Saitama Prefecture, Japan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the composition and Reuben B. Ellestad (1900-1993), American analytical chemist of Minneapolis, Minnesota, USA.
Help on Synonym: Synonym: Chlorellestadite - Renamed Ellestadite-(Cl) by Mineralogical Record v39 (2008), 131

Ellestadite-(Cl) Image

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Comments: Pale yellow rounded crystals of ellestadite-(Cl) (chlorellestadite), in blue marble.
Location: Jensen Quarry, Jurupa, Riverside Co., California, USA. Scale: Crystal Length 5 mm.
© Jeff Weissman / Photographic Guide to Mineral Species

Ellestadite-(Cl) Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.72523
Help on Cell Dimensions: Cell Dimensions: a = 9.51, c = 6.897, Z = 2; V = 540.20 Den(Calc)= 3.15
Help on Crystal System: Crystal System: Hexagonal - Dipyramidal H-M Symbol (6/m) Space Group: P 63/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.75(1), 2.84(0.95), 2.28(0.4),2.8(0.4), 3.45(0.4), 1.85(0.3), 1.96(0.3), 2.65(0.3),

Physical Properties of Ellestadite-(Cl)

Help on Color: Color: Colorless, Light pink, Pale rose, Orange.
Help on Density: Density: 3.07
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Compact - Occurs as a compact mass.
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Ellestadite-(Cl)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.022 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.004 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2068,KPDmeas= 0.2122,KC= 0.2076
Ncalc = 1.64 - 1.65
Help on Optical Data: Optical Data: Uniaxial (-), e=1.649-1.65, w=1.652-1.655, bire=0.0030-0.0050.

Calculated Properties of Ellestadite-(Cl)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.14 gm/cc
note: Specific Gravity of Ellestadite-(Cl) =3.15 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0037459723
Boson Index = 0.9962540277
Help on Photoelectric: Photoelectric: PEEllestadite-(Cl) = 5.96 barns/electron
U=PEEllestadite-(Cl) x rElectron Density= 18.68 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ellestadite-(Cl) is Not Radioactive

Ellestadite-(Cl) Classification

Help on  Dana Class: Dana Class: (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
  (52.04)with cations in [6] and/or > [6] coordination
  (52.04.09)Silicate apatites Ellestadite* Ca5(SiO4,PO4,SO4)3(F,OH,Cl) P 63/m 6/m Britholite-(Ce) (Ce,Ca,Th,La,Nd)5(SiO4,PO4)3(OH,F) P 63/m 6/m Britholite-(Y) (Y,Ca)5(SiO4,PO4)3(OH,F) P 63/m 6/m Ellestadite-(F) Ca5(SiO4,PO4,SO4)3(F,OH,Cl) P 63/m 6/m Ellestadite-(OH) Ca5(SiO4,SO4)3(OH,Cl,F) P 63/m 6/m Ellestadite-(Cl) Ca5(SiO4,PO4,SO4)3(Cl,OH,F) P 63/m 6/m Mattheddleite Pb20(SiO4)7(SO4)4Cl4 P 63/m 6/m Karnasurtite-(Ce) (Ce,La,Th)(Ti,Nb)(Al,Fe)(Si,P)2O7(OH)4•3(H2O)(?) Unk. Hex Fluorbritholite-(Ce) (Ca,Ce,La,Na)5(SiO4,PO4)3(OH,F) P 63/m 6/m Fluorcalciobritholite! (Ca,REE)5[(Si,P)O4]3F P 63/m 6/m
Help on  Strunz Class: Strunz Class: 09.AH.25 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AH -Nesosilicates with CO3, SO4, PO4, etc.
09.AH.25 Britholite-(Ce) (Ce,Ca,Th,La,Nd)5(SiO4,PO4)3(OH,F) P 63/m 6/m
09.AH.25 Britholite-(Y) (Y,Ca)5(SiO4,PO4)3(OH,F) P 63/m 6/m
09.AH.25 Ellestadite-(Cl) Ca5(SiO4,PO4,SO4)3(Cl,OH,F) P 63/m 6/m
09.AH.25 Fluorbritholite-(Ce) (Ca,Ce,La,Na)5(SiO4,PO4)3(OH,F) P 63/m 6/m
09.AH.25 Ellestadite-(F) Ca5(SiO4,PO4,SO4)3(F,OH,Cl) P 63/m 6/m
09.AH.25 Ellestadite* Ca5(SiO4,PO4,SO4)3(F,OH,Cl) P 63/m 6/m
09.AH.25 Ellestadite-(OH) Ca5(SiO4,SO4)3(OH,Cl,F) P 63/m 6/m
09.AH.25 Fluorcalciobritholite! (Ca,REE)5[(Si,P)O4]3F P 63/m 6/m

Other Ellestadite-(Cl) Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Ellestadite-(Cl) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 09.AH.25





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