Ellestadite-(F) Mineral Data
General Ellestadite-(F) Information
Chemical Formula:
Ca5(SiO4,PO4,SO4)3(F,OH,Cl)
Composition:
Molecular Weight = 503.55 gm
Calcium 39.80 % Ca 55.68 % CaO
Silicon 5.58 % Si 11.93 % SiO2
Phosphorus 6.15 % P 14.09 % P2 O5
Hydrogen 0.06 % H 0.54 % H2 O
Sulfur 6.37 % S 15.90 % SO3
Chlorine 0.70 % Cl 0.70 % Cl
- %
Cl -0.16 % -O=Cl2
Oxygen 39.08 % O
Fluorine 2.26 % F 2.26 % F
- %
F -0.95 % -O=F2
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Ca5 (SiO4 )(PO4 )(SO4 )F0.6 (OH)0.3 Cl0.1
Environment:
Contact metamorphic skarn.
IMA Status:
Approved IMA 1982
Locality:
Crestmore, Riverside, California, USA. Link to MinDat.org Location Data.
Name Origin:
Named for the composition and Reuben B. Ellestad (1900-1993), American analytical chemist of Minneapolis, Minnesota, USA.
Synonym:
Fluorellestadite - Renamed Ellestadite-(F) by Mineralogical Record v39 (2008), 131
Ellestadite-(F) Image
Images:
Ellestadite-(F) Crystallography
Axial Ratios:
a:c = 1:0.72915
Cell Dimensions:
a = 9.485, c = 6.916, Z = 2; V = 538.84 Den(Calc)= 3.10
Crystal System:
Hexagonal - Dipyramidal H-M Symbol (6/m) Space Group: P 63 /m
X Ray Diffraction:
By Intensity(I/Io ): 2.84(1), 2.74(0.9), 1.852(0.8),
Physical Properties of Ellestadite-(F)
Cleavage:
None
Color:
Blue, Pale bluish green, Colorless.
Density:
3.03 - 3.07, Average = 3.05
Diaphaneity:
Transparent to Translucent
Habit:
Massive - Uniformly indistinguishable crystals forming large masses.
Hardness:
4.5 - Between Fluorite and Apatite
Luminescence:
Sometimes Fluorescent, Short UV=bluish white, Long UV=weak white.
Luster:
Vitreous - Greasy
Streak:
bluish white
Optical Properties of Ellestadite-(F)
Gladstone-Dale:
CI meas = -0.065 (Fair) - where the CI = (1-KPDmeas /KC ) CI calc = -0.048 (Good) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.2105,KPDmeas = 0.2139,KC = 0.2008 Ncalc = 1.61 - 1.62
Optical Data:
Uniaxial (-), e=1.65, w=1.655, bire=0.0050.
Calculated Properties of Ellestadite-(F)
Electron Density:
Bulk Density (Electron Density)=3.09 gm/cc note: Specific Gravity of Ellestadite-(F) =3.10 gm/cc.
Fermion Index:
Fermion Index = 0.0038071745 Boson Index = 0.9961928255
Photoelectric:
PEEllestadite-(F) = 5.83 barns/electronU=PEEllestadite-(F) x r Electron Density= 18.02 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Ellestadite-(F) is Not Radioactive
Ellestadite-(F) Classification
Dana Class:
52.04.09.03 (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
52.04.09.00 Ellestadite * Ca5(SiO4,PO4,SO4)3(F,OH,Cl) P 63 /m 6/m
52.04.09.01 Britholite-(Ce) (Ce,Ca,Th,La,Nd)5(SiO4,PO4)3(OH,F) P 63 /m 6/m
52.04.09.02 Britholite-(Y) (Y,Ca)5(SiO4,PO4)3(OH,F) P 63 /m 6/m
52.04.09.03 Ellestadite-(F) Ca5(SiO4,PO4,SO4)3(F,OH,Cl) P 63 /m 6/m
52.04.09.04 Ellestadite-(OH) Ca5(SiO4,SO4)3(OH,Cl,F) P 63 /m 6/m
52.04.09.05 Ellestadite-(Cl) Ca5(SiO4,PO4,SO4)3(Cl,OH,F) P 63 /m 6/m
52.04.09.06 Mattheddleite Pb20(SiO4)7(SO4)4Cl4 P 63 /m 6/m
52.04.09.07 Karnasurtite-(Ce) (Ce,La,Th)(Ti,Nb)(Al,Fe)(Si,P)2O7(OH)4•3(H2O)(?) Unk. Hex
52.04.09.08 Fluorbritholite-(Ce) (Ca,Ce,La,Na)5(SiO4,PO4)3(OH,F) P 63 /m 6/m
52.04.09.09 Fluorcalciobritholite ! (Ca,REE)5[(Si,P)O4]3F P 63 /m 6/m
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-(F) Information
References:
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
See Also:
Links to other databases for Ellestadite-(F) :
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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Ellestadite-(F)
Ca5(SiO4,PO4,SO4)3(F,OH,Cl)
Dana No: 52.04.09.03 Strunz No: 09.AH.25
Locality:
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