Mineralogy Database

Ellestadite Mineral Data

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General Ellestadite Information

Help on Chemical  Formula: Chemical Formula: Ca5(SiO4,PO4,SO4)3(F,OH,Cl)
Help on Composition: Composition: Molecular Weight = 500.48 gm
   Calcium     40.04 %  Ca   56.02 % CaO
   Silicon     10.10 %  Si   21.61 % SiO2
   Phosphorus   5.57 %  P    12.76 % P2O5
   Hydrogen     0.06 %  H     0.54 % H2O
   Sulfur       1.92 %  S     4.80 % SO3
   Chlorine     0.71 %  Cl    0.71 % Cl
                 -   %   Cl   -0.16 % -O=Cl2   
   Oxygen      39.32 %  O
   Fluorine     2.28 %  F     2.28 % F
                 -   %   F    -0.96 % -O=F2    
              ______        ______ 
              100.00 %       97.60 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca5(SiO4)1.8(PO4)0.9(SO4)0.3F0.6(OH)0.3Cl0.1
Help on Environment: Environment: Metamorphosed limestone. Group name for hydroxylellestadite - chlorellestadite series.
Help on IMA Status: IMA Status: Not Approved IMA
Help on Locality: Locality: Crestmore quarry, 5 miles NW of Riverside, Riverside Co. California. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Reuben B. Ellestad (1900-1993), American analytical chemist of Minneapolis, Minnesota, USA.
Help on Synonym: Synonym: ICSD 39775
  PDF 25-173

Ellestadite Image

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Comments: Honey yellow hexagonal dipyramids of ellestadite in light blue marble matrix.
Location: Crestmore Quarry, Riverside County, California, USA. Scale: 6 x 7.7 cm.
© John Veevaert

Ellestadite Crystallography

Help on Crystal System: Crystal System: Hexagonal - Dipyramidal H-M Symbol (6/m) Space Group: P 63/m

Optical Properties of Ellestadite

Help on Optical Data: Optical Data:

Calculated Properties of Ellestadite

Help on Fermion Index: Fermion Index: Fermion Index = 0.0055907355
Boson Index = 0.9944092645
Help on Photoelectric: Photoelectric: PEEllestadite = 5.75 barns/electron
U=PEEllestadite x rElectron Density= . barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ellestadite is Not Radioactive

Ellestadite 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 Information

Help on See Also: See Also: Links to other databases for Ellestadite :
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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