Hydroxylellestadite Mineral Data

Hydroxylellestadite Mineral Data +

General Hydroxylellestadite Information

Chemical Formula:

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

Composition:

Molecular Weight = 505.35 gm

Calcium 39.65 % Ca 55.48 % CaO

Silicon 8.34 % Si 17.83 % SiO₂

Hydrogen 0.12 % H 1.07 % H₂O

Sulfur 9.52 % S 23.76 % SO₃

Chlorine 2.10 % Cl 2.10 % Cl

- % Cl -0.47 % -O=Cl₂

Oxygen 39.89 % O

Fluorine 0.38 % F 0.38 % F

- % F -0.16 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₅(SiO₄)_1.5(SO₄)_1.5(OH)_0.6Cl_0.3F_0.1

Environment:

In a skarn.

IMA Status:

Approved IMA 1971

Locality:

Chichibu mine, 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.

Synonym:

ICSD 71350

PDF 25-173

Hydroxylellestadite Image

Images:

Click Here for Larger Hydroxylellestadite Image

Hydroxylellestadite Yeelimite

Comments: Ye'elimite and hydroxylellestadite intimately intergrown as a brownish aggregate in massive anhydrite.
Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag

Images:

Hydroxylellestadite

Comments: Pale violet crystalline massive hydroxylellestadite.
Location: Crestmore Quarry, Riverside County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Hydroxylellestadite Crystallography

Axial Ratios:

a:c = 1:0.72921

Cell Dimensions:

a = 9.491, c = 6.921, Z = 2; V = 539.91 Den(Calc)= 3.11

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): 2.84(1), 2.74(0.6), 1.85(0.5),2.8(0.5), 2.66(0.5), 3.46(0.4), 1.48(0.2), 1.96(0.2),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
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Hughes J M , Drexler J W , Neues Jahrbuch fur Mineralogie, Monatshefte , 1991 (1991) p.327-336, Cation substitution in the apatite tetrahedral site:, crystal structures of type hydroxylellestadtite and type fermorite, Locality: Crestmore, California, USA

Physical Properties of Hydroxylellestadite

Color:

Light pink, Purple gray, Pink.

Density:

3.02

Diaphaniety:

Translucent

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Hardness:

4.5 - Between Fluorite and Apatite

Luster:

Vitreous (Glassy)

Streak:

beige

Optical Properties of Hydroxylellestadite

Gladstone-Dale:

CI meas= -0.047 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.017 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2096,KPDmeas= 0.2159,KC= 0.2061

Optical Data:

Uniaxial (-), e=1.65, w=1.654, bire=0.0040.

Calculated Properties of Hydroxylellestadite

Electron Density:

r_electron=3.11 gm/cc
note: r_{Hydroxylellestadite}=3.11 gm/cc.

Fermion Index

Fermion Index = 0.00533
Boson Index = 0.99467

Photoelectric:

PE_{Hydroxylellestadite}= 5.89 barns/electron
U=PE_{Hydroxylellestadite} x r_electron= 18.30 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Hydroxylellestadite is Not Radioactive

Hydroxylellestadite Classification

Dana Class:

52.4.9.4 (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.27-30 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 Hydroxylellestadite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Larousse des Mineraux,1981)

See Also:

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

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Hydroxylellestadite

Ca5(SiO4,SO4)3(OH,Cl,F)
Dana No: 52.4.9.4 Strunz No: VIII/B.27-30
Locality:

Notes: