Farneseite Mineral Data

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General Farneseite Information

Chemical Formula:

(Na37K9Ca10)S56(Si42Al42)S84O168(SO4)12•6(H2O)

Composition:

Molecular Weight = 8,075.57 gm

Potassium 4.44 % K 5.35 % K₂O

Sodium 10.37 % Na 13.98 % Na₂O

Calcium 4.34 % Ca 6.08 % CaO

Aluminum 13.87 % Al 26.20 % Al₂O₃

Silicon 14.78 % Si 31.62 % SiO₂

Hydrogen 0.08 % H 0.68 % H₂O

Sulfur 4.54 % S 11.33 % SO₃

Chlorine 4.60 % Cl 4.60 % Cl

- % Cl -1.04 % -O=Cl₂

Oxygen 42.94 % O

Fluorine 0.04 % F 0.04 % F

- % F -0.02 % -O=F₂

______ ______

100.00 % 98.82 % = TOTAL OXIDE

Empirical Formula:

Na_36.43K_9.18Ca_8.75Si_42.5Al_41.5O₁₆₈(SO₄)_11.43F_0.16Cl_10.48·3.03(H₂O)

Environment:

Found in a pyroclastic sequence, associated with the Latera caldera collapse in the Latium volcanic area. Cancrinite-sodalite group.

IMA Status:

Approved IMA 2004 (Dana # Added)

Locality:

Farnese, Viterbo province, Latium, Italy. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

IMA2004-043

Farneseite Image

Images:

Farneseite

Comments: Crystal cluster of farneseite. Shown are the hexagonal truncated pyramid habit and terminations crossed by striations..
Location: Farnese, Viterbo province, Latium, Italy. Scale: Crystal size 1.2 mm.
© Gruppo Mineralogico Romano

Farneseite Crystallography

Axial Ratios:

a:c = 1:2.87363

Cell Dimensions:

a = 12.8784, c = 37.0078, Z = 1; V = 5,315.55 Den(Calc)= 2.52

Crystal System:

Hexagonal - Dihexagonal DipyramidalH-M Symbol (6/m 2/m 2/m) Space Group: P 6₃/m

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

By Intensity(I/I_o): 3.722(1)(300 ), 3.485(0.65)(216 ), 3.119(0.36)(218,223 ),2.149(0.34)(4.0.11,330), 2.648(0.32)(0.0.14,228), 3.668(0.26)(215 ), 3.862(0.23)(109 ), 5.404(0.2)(106 ), 2.857(0.18)(315,1.1.12),

Crystal Structure:

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Camara F , Bellatreccia F , Della Ventura G , Mottana A , European Journal of Mineralogy , 17 (2005) p.839-846, Farneseite, a new mineral of the cancrinite - sodalite group, with a 14-layer stacking sequence: occurence and crystal structure, Locality: Latera Caldera, Farnese, Viterbo Province, Italy

Physical Properties of Farneseite

Cleavage:

{001} Poor

Color:

Colorless.

Diaphaneity:

Transparent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Farneseite

Gladstone-Dale:

CI calc= 0.038 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1988,KC= 0.2067
Ncalc = 1.52

Optical Data:

Uniaxial (+), w=1.499, e=1.503, bire=0.0040.

Calculated Properties of Farneseite

Electron Density:

Bulk Density (Electron Density)=2.49 gm/cc
note: Specific Gravity of Farneseite =2.52 gm/cc.

Fermion Index:

Fermion Index = 0.0075132242
Boson Index = 0.9924867758

Photoelectric:

PE_Farneseite= 2.70 barns/electron
U=PE_Farneseite x r_electron= 6.71 barns/cc.

Radioactivity:

GRapi = 63.34 (Gamma Ray American Petroleum Institute Units)
Concentration of Farneseite per GRapi unit = 1.58 (%)

Estimated Radioactivity from Farneseite - barely detectable

Farneseite Classification

Dana Class:

76.02.05.18 (76)Tectosilicate Al-Si Framework

(76.02)Feldspathoids and related species

(76.02.05)Cancrinite group

76.02.05.01 Afghanite (Na,Ca,K)8(Si,Al)12O24(SO4,Cl,CO3)3•(H2O) P 6₃/mmc, P 6₃mc, or P 62c Hex

76.02.05.02 Bystrite (Na,K)7Ca(Si6Al6)O24S4.5•(H2O) P 3₁c 3m

76.02.05.03 Cancrinite Na6Ca2Al6Si6O24(CO3)2 P 6₃ 6

76.02.05.04 Cancrisilite Na7Al5Si7O24(C03)•3(H2O) P 6₃ 6

76.02.05.05 Davyne Na4K2Ca2Si6Al6O24(SO4)Cl2 P 6₃/m 6/m

76.02.05.06 Franzinite [(Na,K)30Ca10][Si30Al30O120](SO4)10•2(H2O) P 3₂1 3 2

76.02.05.07 Giuseppettite [Na42K16Ca6]S64Si48Al48O192(SO4)10Cl2•5H2O P 3₁c 3m

76.02.05.08 Hydroxycancrinite Na4(AlSiO4)3(OH)•(H2O) P 6₃ 6

76.02.05.09 Liottite (Ca,Na,K)8(Si,Al)12O24[(SO4),(CO3),Cl,OH]4•(H2O) P 6m2 6 m2

76.02.05.10 Microsommite (Na,Ca,K)7-8(Si,Al)12O24(Cl,SO4)2-3 P 6₃22 6 2 2

76.02.05.11 Pitiglianoite Na6K2Si6Al6O24(SO4)•2(H2O) P 6₃ 6

76.02.05.12 Quadridavyne (Na,K)6Ca2Al6Si6O24Cl4 P 6₃/m 6/m

76.02.05.13 Sacrofanite (Na,Ca,K)9Si6Al6O24[(OH),(SO4),(CO3),Cl)]4•n(H2O) P 6₃/mmc ? 6/m 2/m 2/m

76.02.05.14 Tounkite (Na,Ca,K)8Al6Si6O24(SO4)2Cl•(H2O) P 6₂22 6 2 2

76.02.05.15 Vishnevite (Na,Ca,K)6(Si,Al)12O24[(SO4),(CO3),Cl2]2-4•n(H2O) P 6₃22 6 2 2

76.02.05.16 Wenkite Ba4Ca6(Si,Al)20O39(OH)2(SO4)3•n(H2O)(?) P 62m 6 m2

76.02.05.17 Marinellite! [(Na,K)42Ca6](Si36Al36O144)(SO4)8Cl2•6(H2O) P 3₁c or P 2c Trig

76.02.05.18 Farneseite! (Na37K9Ca10)S56(Si42Al42)S84O168(SO4)12•6(H2O) P 6₃/m 6/m 2/m 2/m

76.02.05.19 Alloriite! Na5K1.5Ca(Si6Al6O24)(SO4)(OH)0.5•H2O P 3₁c 3m

76.02.05.20 Biachellaite (Na,Ca,K)8(Si6Al6O24)(SO4)2(OH)0.5•H2O P 3 3

76.02.05.21 IMA2008-006! [Na82.5Ca33K16.5](Si99Al99O396)(SO4)33•4H2O P 3 3

76.02.05.22 Kyanoxalite! Na7(Al5-6Si6-7O24)(C2O4)0.5-1.0•5H2O P 6₃ 6

76.02.05.23 IMA2008-065! (Na,K)6Ca2(Si6Al6O24)Cl2(CO3) P 6₃ 6

Strunz Class:

09.FB.05 09 - SILICATES (Germanates)

09.F - Tektosilicates without Zeolitic H2O

09.FB -Tektosilicates with additional anions

09.FB.05 Bystrite (Na,K)7Ca(Si6Al6)O24S4.5•(H2O) P 3₁c 3m

09.FB.05 Afghanite (Na,Ca,K)8(Si,Al)12O24(SO4,Cl,CO3)3•(H2O) P 6₃/mmc, P 6₃mc, or P 62c Hex

09.FB.05 Cancrisilite Na7Al5Si7O24(C03)•3(H2O) P 6₃ 6

09.FB.05 Cancrinite Na6Ca2Al6Si6O24(CO3)2 P 6₃ 6

09.FB.05 Hydroxycancrinite Na4(AlSiO4)3(OH)•(H2O) P 6₃ 6

09.FB.05 Franzinite [(Na,K)30Ca10][Si30Al30O120](SO4)10•2(H2O) P 3₂1 3 2

09.FB.05 Liottite (Ca,Na,K)8(Si,Al)12O24[(SO4),(CO3),Cl,OH]4•(H2O) P 6m2 6 m2

09.FB.05 Davyne Na4K2Ca2Si6Al6O24(SO4)Cl2 P 6₃/m 6/m

09.FB.05 Giuseppettite [Na42K16Ca6]S64Si48Al48O192(SO4)10Cl2•5H2O P 3₁c 3m

09.FB.05 Quadridavyne (Na,K)6Ca2Al6Si6O24Cl4 P 6₃/m 6/m

09.FB.05 Pitiglianoite Na6K2Si6Al6O24(SO4)•2(H2O) P 6₃ 6

09.FB.05 Microsommite (Na,Ca,K)7-8(Si,Al)12O24(Cl,SO4)2-3 P 6₃22 6 2 2

09.FB.05 Vishnevite (Na,Ca,K)6(Si,Al)12O24[(SO4),(CO3),Cl2]2-4•n(H2O) P 6₃22 6 2 2

09.FB.05 Sacrofanite (Na,Ca,K)9Si6Al6O24[(OH),(SO4),(CO3),Cl)]4•n(H2O) P 6₃/mmc ? 6/m 2/m 2/m

09.FB.05 Marinellite! [(Na,K)42Ca6](Si36Al36O144)(SO4)8Cl2•6(H2O) P 3₁c or P 2c Trig

09.FB.05 Tounkite (Na,Ca,K)8Al6Si6O24(SO4)2Cl•(H2O) P 6₂22 6 2 2

09.FB.05 IMA2008-065! (Na,K)6Ca2(Si6Al6O24)Cl2(CO3) P 6₃ 6

09.FB.05 Farneseite! (Na37K9Ca10)S56(Si42Al42)S84O168(SO4)12•6(H2O) P 6₃/m 6/m 2/m 2/m

09.FB.05 Biachellaite (Na,Ca,K)8(Si6Al6O24)(SO4)2(OH)0.5•H2O P 3 3

09.FB.05 IMA2008-006! [Na82.5Ca33K16.5](Si99Al99O396)(SO4)33•4H2O P 3 3

09.FB.05 Alloriite! Na5K1.5Ca(Si6Al6O24)(SO4)(OH)0.5•H2O P 3₁c 3m

Other Farneseite Information

References:

NAME( AmMin, v91, p1454) PHYS. PROP.(AmMin, v91, p1454) OPTIC PROP.(AmMin, v91, p1454)

See Also:

Links to other databases for Farneseite :
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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Print or Cut-and-Paste your Farneseite Specimen Label here :

Farneseite

(Na37K9Ca10)S56(Si42Al42)S84O168(SO4)12•6(H2O)
Dana No: 76.02.05.18 Strunz No: 09.FB.05
Locality:

Notes: