Cesanite Mineral Data

Cesanite Mineral Data

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General Cesanite Information

Chemical Formula:

Na7Ca3(SO4)6(OH)·0.8(H2O)

Composition:

Molecular Weight = 888.96 gm

Sodium 18.10 % Na 24.40 % Na₂O

Calcium 13.53 % Ca 18.92 % CaO

Hydrogen 0.29 % H 2.63 % H₂O

Sulfur 21.64 % S 54.04 % SO₃

Oxygen 46.43 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₇Ca₃(SO₄)₆(OH)·0.8(H₂O)

IMA Status:

Approved IMA 1981

Locality:

Core samples from the Cesano-I geothermal well, Cesano area, Latium, Italy. Link to MinDat.org Location Data.

Name Origin:

Named after the locality.

Synonym:

ICSD 31251

PDF 35-506

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Cesanite Crystallography

Axial Ratios:

a:c = 1:0.73008

Cell Dimensions:

a = 9.463, c = 6.9088, Z = 1; V = 535.79 Den(Calc)= 2.75

Crystal System:

Hexagonal - Trigonal DipyramidalH-M Symbol (6) Space Group: P 6

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

By Intensity(I/I_o): 2.727(1), 3.448(0.87), 3.896(0.66),

Crystal Structure:

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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
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Piotrowski A , Kahlenberg V , Fischer R X , Lee Y , Parise J B , American Mineralogist , 87 (2002) p.715-720, The crystal structures of cesanite and its synthetic analogue -, A comparison, Sample: synthetic

View Additional jPOWD Structure files for Cesanite
[1] [2]

Physical Properties of Cesanite

Color:

Colorless, White.

Density:

2.786

Diaphaniety:

Transparent

Hardness:

2-3 - Gypsum-Calcite

Streak:

white

Optical Properties of Cesanite

Gladstone-Dale:

CI meas= -0.067 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.081 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2062,KPDmeas= 0.2035,KC= 0.1907

Optical Data:

Uniaxial (-), e=1.564, w=1.57, bire=0.0060.

Calculated Properties of Cesanite

Electron Density:

r_electron=2.77 gm/cc
note: r_Cesanite=2.79 gm/cc.

Fermion Index

Fermion Index = 0.00202
Boson Index = 0.99798

Photoelectric:

PE_Cesanite= 3.26 barns/electron
U=PE_Cesanite x r_electron= 9.04 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Cesanite is Not Radioactive

Cesanite Classification

Dana Class:

30.3.3.1 (30)Anhydrous Sulfates Containing Hydroxyl or Halogen

(30.3)with miscellaneous formulae

(30.3.3)Dana Group

30.3.3.1 Cesanite Na7Ca3(SO4)6(OH)·0.8(H2O) P 6 6

Strunz Class:

VI/B.12-50 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 Cesanite Information

References:

NAME( AmMin, Vol 87, p 715) PHYS. PROP.(AmMin, Vol 87, p 715) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Cesanite :
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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Cesanite

Na7Ca3(SO4)6(OH)·0.8(H2O)
Dana No: 30.3.3.1 Strunz No: VI/B.12-50
Locality:

Notes: