Chlorellestadite Mineral Data

Chlorellestadite Mineral Data

General Chlorellestadite Information

Chemical Formula:

Ca5(SiO4,PO4,SO4)3(Cl,OH,F)

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

Empirical Formula:

Ca₅(SiO₄)(PO₄)(SO₄)Cl_0.6(OH)_0.3F_0.1

Environment:

In a skarn.

IMA Status:

Approved IMA 1982

Locality:

Takiue Saitama Prefecture, Japan. 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.

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Chlorellestadite Crystallography

Axial Ratios:

a:c = 1:0.72523

Cell Dimensions:

a = 9.51, c = 6.897, Z = 2; V = 540.20 Den(Calc)= 3.15

Crystal System:

Hexagonal - DipyramidalH-M Symbol (6/m) Space Group: P 6₃/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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 Chlorellestadite

Color:

Colorless, Light pink, Pale rose, Orange.

Density:

3.07

Diaphaniety:

Transparent to Translucent

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Compact - Occurs as a compact mass.

Hardness:

4.5 - Between Fluorite and Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Chlorellestadite

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

Optical Data:

Uniaxial (-), e=1.649-1.65, w=1.652-1.655, bire=0.0030-0.0050.

Calculated Properties of Chlorellestadite

Electron Density:

r_electron=3.14 gm/cc
note: r_{Chlorellestadite}=3.15 gm/cc.

Fermion Index

Fermion Index = 0.00374
Boson Index = 0.99626

Photoelectric:

PE_{Chlorellestadite}= 5.96 barns/electron
U=PE_{Chlorellestadite} x r_electron= 18.68 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Chlorellestadite is Not Radioactive

Chlorellestadite Classification

Dana Class:

52.4.9.5 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O

(52.4)with cations in [6] and/or > [6] coordination

(52.4.9)Silicate apatites

52.4.9.0 Ellestadite* Ca5(SiO4,PO4,SO4)3(F,OH,Cl) P 6₃/m 6/m

52.4.9.1 Britholite-(Ce) (Ce,Ca,Th,La,Nd)5(SiO4,PO4)3(OH,F) P 6₃/m 6/m

52.4.9.2 Britholite-(Y) (Y,Ca)5(SiO4,PO4)3(OH,F) P 6₃/m 6/m

52.4.9.3 Fluorellestadite Ca5(SiO4,PO4,SO4)3(F,OH,Cl) P 6₃/m 6/m

52.4.9.4 Hydroxylellestadite Ca5(SiO4,SO4)3(OH,Cl,F) P 6₃/m 6/m

52.4.9.5 Chlorellestadite Ca5(SiO4,PO4,SO4)3(Cl,OH,F) P 6₃/m 6/m

52.4.9.6 Mattheddleite Pb20(SiO4)7(SO4)4Cl4 P 6₃/m 6/m

52.4.9.7 Karnasurtite-(Ce) (Ce,La,Th)(Ti,Nb)(Al,Fe)(Si,P)2O7(OH)4·3(H2O)(?) Unk. Hex

52.4.9.8 Fluorbritholite-(Ce) (Ca,Ce,La,Na)5(SiO4,PO4)3(OH,F) P 6₃/m 6/m

Strunz Class:

VIII/B.27-20 VIII - Silicates

VIII/B - Nesosubsilicates, with anions unfamiliar to tetraheders, with groups [SO4]2-, [CrO4]2- and [PO4]3-

VIII/B.27 - Fluorellestadite - Lessingite-(Ce) series

VIII/B.27-10 Fluorellestadite Ca5(SiO4,PO4,SO4)3(F,OH,Cl) P 6₃/m 6/m

VIII/B.27-20 Chlorellestadite Ca5(SiO4,PO4,SO4)3(Cl,OH,F) P 6₃/m 6/m

VIII/B.27-30 Hydroxylellestadite Ca5(SiO4,SO4)3(OH,Cl,F) P 6₃/m 6/m

VIII/B.27-40 Mattheddleite Pb20(SiO4)7(SO4)4Cl4 P 6₃/m 6/m

VIII/B.27-50 Britholite-(Y) (Y,Ca)5(SiO4,PO4)3(OH,F) P 6₃/m 6/m

VIII/B.27-60 Britholite-(Ce) (Ce,Ca,Th,La,Nd)5(SiO4,PO4)3(OH,F) P 6₃/m 6/m

VIII/B.27-62 Fluorbritholite-(Ce) (Ca,Ce,La,Na)5(SiO4,PO4)3(OH,F) P 6₃/m 6/m

Other Chlorellestadite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Chlorellestadite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris

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Chlorellestadite

Ca5(SiO4,PO4,SO4)3(Cl,OH,F)
Dana No: 52.4.9.5 Strunz No: VIII/B.27-20
Locality:

Notes: