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Farneseite Mineral Data
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General Farneseite Information
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 Chemical Formula: |
(Na37K9Ca10)S56(Si42Al42)S84O168(SO4)12•6(H2O) |
| Composition: |
Molecular Weight = 8,075.57 gm |
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Potassium 4.44 % K 5.35 % K2O |
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Sodium 10.37 % Na 13.98 % Na2O |
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Calcium 4.34 % Ca 6.08 % CaO |
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Aluminum 13.87 % Al 26.20 % Al2O3 |
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Silicon 14.78 % Si 31.62 % SiO2 |
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Hydrogen 0.08 % H 0.68 % H2O |
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Sulfur 4.54 % S 11.33 % SO3 |
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Chlorine 4.60 % Cl 4.60 % Cl |
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- %
Cl -1.04 % -O=Cl2 |
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Oxygen 42.94 % O |
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Fluorine 0.04 % F 0.04 % F |
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- %
F -0.02 % -O=F2 |
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______ ______ |
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100.00 % 98.82 % = TOTAL OXIDE |
| Empirical Formula: |
Na36.43K9.18Ca8.75Si42.5Al41.5O168(SO4)11.43F0.16Cl10.48�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 |
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Farneseite Image |
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Images:
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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 |
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Farneseite Crystallography
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| 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 Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 63/m |
| X Ray Diffraction: |
By Intensity(I/Io): 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), |
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Physical Properties of Farneseite
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| 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 |
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Optical Properties of Farneseite
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| 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. |
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Calculated Properties of Farneseite
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| Electron Density: |
Bulk Density (Electron Density)=2.49 gm/cc
note: Specific Gravity of Farneseite =2.52 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0075132242
Boson Index = 0.9924867758 |
| Photoelectric: |
PEFarneseite = 2.70 barns/electron
U=PEFarneseite x relectron= 6.71 barns/cc.
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| Radioactivity: |
GRapi = 63.34 (Gamma Ray American Petroleum Institute Units)
Concentration of Farneseite per GRapi unit = 1.58 (%)
Estimated Radioactivity from Farneseite  - barely detectable
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Farneseite Classification
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| Dana Class: |
76.02.05.18 (76)Tectosilicate Al-Si Framework |
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(76.02)Feldspathoids and related species |
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(76.02.05)Cancrinite group |
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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 |
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76.02.05.02 Bystrite (Na,K)7Ca(Si6Al6)O24S4.5•(H2O) P 31c 3m |
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76.02.05.03 Cancrinite Na6Ca2Al6Si6O24(CO3)2 P 63 6 |
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76.02.05.04 Cancrisilite Na7Al5Si7O24(C03)•3(H2O) P 63 6 |
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76.02.05.05 Davyne Na4K2Ca2Si6Al6O24(SO4)Cl2 P 63/m 6/m |
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76.02.05.06 Franzinite [(Na,K)30Ca10][Si30Al30O120](SO4)10•2(H2O) P 321 3 2 |
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76.02.05.07 Giuseppettite [Na42K16Ca6]S64Si48Al48O192(SO4)10Cl2•5H2O P 31c 3m |
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76.02.05.08 Hydroxycancrinite Na4(AlSiO4)3(OH)•(H2O) P 63 6 |
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76.02.05.09 Liottite (Ca,Na,K)8(Si,Al)12O24[(SO4),(CO3),Cl,OH]4•(H2O) P 6m2 6 m2 |
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76.02.05.10 Microsommite (Na,Ca,K)7-8(Si,Al)12O24(Cl,SO4)2-3 P 6322 6 2 2 |
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76.02.05.11 Pitiglianoite Na6K2Si6Al6O24(SO4)•2(H2O) P 63 6 |
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76.02.05.12 Quadridavyne (Na,K)6Ca2Al6Si6O24Cl4 P 63/m 6/m |
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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 |
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76.02.05.14 Tounkite (Na,Ca,K)8Al6Si6O24(SO4)2Cl•(H2O) P 6222 6 2 2 |
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76.02.05.15 Vishnevite (Na,Ca,K)6(Si,Al)12O24[(SO4),(CO3),Cl2]2-4•n(H2O) P 6322 6 2 2 |
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76.02.05.16 Wenkite Ba4Ca6(Si,Al)20O39(OH)2(SO4)3•n(H2O)(?) P 62m 6 m2 |
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76.02.05.17 Marinellite! [(Na,K)42Ca6](Si36Al36O144)(SO4)8Cl2•6(H2O) P 31c or P 2c Trig |
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76.02.05.18 Farneseite! (Na37K9Ca10)S56(Si42Al42)S84O168(SO4)12•6(H2O) P 63/m 6/m 2/m 2/m |
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76.02.05.19 Alloriite! Na5K1.5Ca(Si6Al6O24)(SO4)(OH)0.5•H2O P 31c 3m |
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76.02.05.20 Biachellaite (Na,Ca,K)8(Si6Al6O24)(SO4)2(OH)0.5•H2O P 3 3 |
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76.02.05.21 IMA2008-006! [Na82.5Ca33K16.5](Si99Al99O396)(SO4)33•4H2O P 3 3 |
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76.02.05.22 Kyanoxalite! Na7(Al5-6Si6-7O24)(C2O4)0.5-1.0•5H2O P 63 6 |
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76.02.05.23 IMA2008-065! (Na,K)6Ca2(Si6Al6O24)Cl2(CO3) P 63 6 |
| Strunz Class: |
09.FB.05 09 - SILICATES (Germanates) |
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09.F - Tektosilicates without Zeolitic H2O |
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09.FB -Tektosilicates with additional anions |
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09.FB.05 Bystrite (Na,K)7Ca(Si6Al6)O24S4.5•(H2O) P 31c 3m |
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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 |
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09.FB.05 Cancrisilite Na7Al5Si7O24(C03)•3(H2O) P 63 6 |
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09.FB.05 Cancrinite Na6Ca2Al6Si6O24(CO3)2 P 63 6 |
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09.FB.05 Hydroxycancrinite Na4(AlSiO4)3(OH)•(H2O) P 63 6 |
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09.FB.05 Franzinite [(Na,K)30Ca10][Si30Al30O120](SO4)10•2(H2O) P 321 3 2 |
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09.FB.05 Liottite (Ca,Na,K)8(Si,Al)12O24[(SO4),(CO3),Cl,OH]4•(H2O) P 6m2 6 m2 |
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09.FB.05 Davyne Na4K2Ca2Si6Al6O24(SO4)Cl2 P 63/m 6/m |
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09.FB.05 Giuseppettite [Na42K16Ca6]S64Si48Al48O192(SO4)10Cl2•5H2O P 31c 3m |
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09.FB.05 Quadridavyne (Na,K)6Ca2Al6Si6O24Cl4 P 63/m 6/m |
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09.FB.05 Pitiglianoite Na6K2Si6Al6O24(SO4)•2(H2O) P 63 6 |
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09.FB.05 Microsommite (Na,Ca,K)7-8(Si,Al)12O24(Cl,SO4)2-3 P 6322 6 2 2 |
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09.FB.05 Vishnevite (Na,Ca,K)6(Si,Al)12O24[(SO4),(CO3),Cl2]2-4•n(H2O) P 6322 6 2 2 |
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09.FB.05 Sacrofanite (Na,Ca,K)9Si6Al6O24[(OH),(SO4),(CO3),Cl)]4•n(H2O) P 63/mmc ? 6/m 2/m 2/m |
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09.FB.05 Marinellite! [(Na,K)42Ca6](Si36Al36O144)(SO4)8Cl2•6(H2O) P 31c or P 2c Trig |
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09.FB.05 Tounkite (Na,Ca,K)8Al6Si6O24(SO4)2Cl•(H2O) P 6222 6 2 2 |
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09.FB.05 IMA2008-065! (Na,K)6Ca2(Si6Al6O24)Cl2(CO3) P 63 6 |
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09.FB.05 Farneseite! (Na37K9Ca10)S56(Si42Al42)S84O168(SO4)12•6(H2O) P 63/m 6/m 2/m 2/m |
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09.FB.05 Biachellaite (Na,Ca,K)8(Si6Al6O24)(SO4)2(OH)0.5•H2O P 3 3 |
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09.FB.05 IMA2008-006! [Na82.5Ca33K16.5](Si99Al99O396)(SO4)33•4H2O P 3 3 |
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09.FB.05 Alloriite! Na5K1.5Ca(Si6Al6O24)(SO4)(OH)0.5•H2O P 31c 3m |
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Other Farneseite Information
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| 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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Farneseite
(Na37K9Ca10)S56(Si42Al42)S84O168(SO4)12•6(H2O)
Dana No: 76.02.05.18 Strunz No: 09.FB.05
Locality:
Notes:
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