Galeite Mineral Data

Galeite Mineral Data +

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General Galeite Information

Chemical Formula:

Na15(SO4)5F4Cl

Composition:

Molecular Weight = 936.61 gm

Sodium 36.82 % Na 49.63 % Na₂O

Sulfur 17.12 % S 42.74 % SO₃

Chlorine 3.79 % Cl 3.79 % Cl

- % Cl -0.85 % -O=Cl₂

Oxygen 34.16 % O

Fluorine 8.11 % F 8.11 % F

- % F -3.42 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₁₅(SO₄)₅F₄Cl

Environment:

Continental evaporite deposits.

IMA Status:

Valid Species (Pre-IMA) 1955

Locality:

Searles Lake, San Bernardino Co., California. Link to MinDat.org Location Data.

Synonym:

ICSD 4290

PDF 15-651

Galeite Image

Images:

Galeite

Comments: White translucent spherical crystalline aggregates of galeite in clay.
Location: Searles Lake, San Bernardino County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Galeite Crystallography

Axial Ratios:

a:c = 1:1.14413

Cell Dimensions:

a = 12.197, c = 13.955, Z = 3; V = 1,797.90 Den(Calc)= 2.60

Crystal System:

Trigonal - Ditrigonal PyramidalH-M Symbol (3m) Space Group: P 3m

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

By Intensity(I/I_o): 2.79(1), 3.52(0.8), 3.68(0.7),

Crystal Structure:

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Fanfani L , Nunzi A , Zanazzi P F , Zanzari A R , Mineralogical Magazine , 40 (1975) p.357-361, The crystal structure of galeite, Na15(SO4)5F4Cl, Locality: Searles Lake, California, USA

Physical Properties of Galeite

Color:

Colorless, White.

Density:

2.605

Streak:

white

Optical Properties of Galeite

Gladstone-Dale:

CI meas= 0.074 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.072 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1723,KPDmeas= 0.172,KC= 0.1857

Optical Data:

Uniaxial (+), w=1.447, e=1.449, bire=0.0020.

Calculated Properties of Galeite

Electron Density:

r_electron=2.54 gm/cc
note: r_Galeite=2.60 gm/cc.

Fermion Index

Fermion Index = 0.00144
Boson Index = 0.99856

Photoelectric:

PE_Galeite= 1.91 barns/electron
U=PE_Galeite x r_electron= 4.85 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Galeite is Not Radioactive

Galeite Classification

Dana Class:

30.1.8.1 (30)Anhydrous Sulfates Containing Hydroxyl or Halogen

(30.1)where (A B)m (XO4)p Zq where m:p>2:1

(30.1.8)Dana Group

30.1.8.1 Galeite Na15(SO4)5F4Cl P 3m 3m

Strunz Class:

VI/B.12-20 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/B - Waterfree sulfates [SO4]2- with unfamiliar anions. mostly big cations

VI/B.12 - Sulphohalite - Caracolite series

VI/B.12-10 Sulphohalite Na6(SO4)2FCl F m3m 4/m 3 2/m

VI/B.12-20 Galeite Na15(SO4)5F4Cl P 3m 3m

VI/B.12-30 Schairerite Na21(SO4)7F6Cl P 3₁m 3m

VI/B.12-40 Kogarkoite Na3(SO4)F Unk (pseudo HEX-R) Mono

VI/B.12-50 Cesanite Na7Ca3(SO4)6(OH)·0.8(H2O) P 6 6

VI/B.12-60 Caracolite Na3Pb2(SO4)3Cl P 2₁/m 2/m

Other Galeite Information

References:

NAME( MinRec) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Galeite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 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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Galeite

Na15(SO4)5F4Cl
Dana No: 30.1.8.1 Strunz No: VI/B.12-20
Locality:

Notes: