General Sacrofanite Information
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Chemical Formula: |
(Na,Ca,K)9Si6Al6O24[(OH),(SO4),(CO3),Cl)]4·n(H2O) |
Composition: |
Molecular Weight = 1,168.52 gm |
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Potassium 4.68 % K 5.64 % K2O |
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Sodium 12.39 % Na 16.71 % Na2O |
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Calcium 6.17 % Ca 8.64 % CaO |
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Aluminum 13.16 % Al 24.87 % Al2O3 |
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Silicon 15.14 % Si 32.39 % SiO2 |
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Hydrogen 0.28 % H 2.54 % H2O |
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Carbon 0.31 % C 1.13 % CO2 |
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Sulfur 3.02 % S 7.54 % SO3 |
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Chlorine 0.61 % Cl 0.61 % Cl |
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- % Cl -0.14 % -O=Cl2 |
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Oxygen 44.23 % O |
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______ ______ |
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100.00 % 99.93 % = TOTAL OXIDE |
Empirical Formula: |
Na6.3Ca1.8K1.4Si6.3Al5.7O24(OH)2.7(SO4)1.1(CO3)0.3Cl0.2·0.3(H2O) |
Environment: |
In a cavity of an ejecta block. |
IMA Status: |
Approved IMA 1980 |
Locality: |
Mt. Sabatini, Sacrafano volcano area, Latium, Italy. Link to MinDat.org Location Data. |
Name Origin: |
Named for the locality. |
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Sacrofanite Image |
Images:
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Sacrofanite Crystallography
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Axial Ratios: |
a:c = 1:5.61523 |
Cell Dimensions: |
a = 12.865, c = 72.24, Z = 14; V = 10,354.47 Den(Calc)= 2.62 |
Crystal System: |
Hexagonal - Dihexagonal DipyramidalH-M Symbol (6/m 2/m 2/m) Space Group: P 63/mmc ? |
X Ray Diffraction: |
By Intensity(I/Io): 3.73(1), 3.483(0.43), 2.648(0.3), |
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Physical Properties of Sacrofanite
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Cleavage: |
[0001] Perfect, [0110] Perfect |
Color: |
Colorless. |
Density: |
2.42 |
Diaphaniety: |
Transparent |
Habit: |
Hexagonal - Six-sided crystal shape in cross-section or habit. |
Habit: |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). |
Hardness: |
5.5-6 - Knife Blade-Orthoclase |
Luster: |
Vitreous (Glassy) |
Streak: |
white |
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Optical Properties of Sacrofanite
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Gladstone-Dale: |
CI meas= 0.007 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.082 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1891,KPDmeas= 0.2048,KC= 0.2061 |
Optical Data: |
Uniaxial (-), e=1.486, w=1.505, bire=0.0190. |
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Calculated Properties of Sacrofanite
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Electron Density: |
relectron=2.40 gm/cc note: rSacrofanite =2.42 gm/cc. |
Fermion Index |
Fermion Index = 0.00763 Boson Index = 0.99237 |
Photoelectric: |
PESacrofanite = 2.62 barns/electron U=PESacrofanite x relectron= 6.28 barns/cc. |
Radioactivity: |
GRapi = 66.93 (Gamma Ray American Petroleum Institute Units)
Estimated Radioactivity from Sacrofanite - barely detectable
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Sacrofanite Classification
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Dana Class: |
76.2.5.13 (76)Tectosilicate Al-Si Framework |
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(76.2)Feldspathoids and related species |
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(76.2.5)Cancrinite group |
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76.2.5.1 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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76.2.5.2 Bystrite (Na,K)7Ca(Si6Al6)O24S4.5·(H2O) P 31c 3m |
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76.2.5.3 Cancrinite Na6Ca2Al6Si6O24(CO3)2 P 63 6 |
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76.2.5.4 Cancrisilite Na7Al5Si7O24(C03)·3(H2O) P 63 6 |
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76.2.5.5 Davyne Na4K2Ca2Si6Al6O24(SO4)Cl2 P 63/m 6/m |
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76.2.5.6 Franzinite [(Na,K)30Ca10][Si30Al30O120](SO4)10·2(H2O) P 321 3 2 |
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76.2.5.7 Giuseppettite [Na42K16Ca6]S64Si48Al48O192(SO4)10Cl2·5H2O P 31c 3m |
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76.2.5.8 Hydroxycancrinite Na4(AlSiO4)3(OH)·(H2O) P 63 6 |
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76.2.5.9 Liottite (Ca,Na,K)8(Si,Al)12O24[(SO4),(CO3),Cl,OH]4·(H2O) P 6m2 6 m2 |
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76.2.5.10 Microsommite (Na,Ca,K)7-8(Si,Al)12O24(Cl,SO4)2-3 P 6322 6 2 2 |
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76.2.5.11 Pitiglianoite Na6K2Si6Al6O24(SO4)·2(H2O) P 63 6 |
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76.2.5.12 Quadridavyne (Na,K)6Ca2Al6Si6O24Cl4 P 63/m 6/m |
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76.2.5.13 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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76.2.5.14 Tounkite (Na,Ca,K)8Al6Si6O24(SO4)2Cl·(H2O) P 6222 6 2 2 |
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76.2.5.15 Vishnevite (Na,Ca,K)6(Si,Al)12O24[(SO4),(CO3),Cl2]2-4·n(H2O) P 6322 6 2 2 |
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76.2.5.16 Wenkite Ba4Ca6(Si,Al)20O39(OH)2(SO4)3·n(H2O)(?) P 62m 6 m2 |
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76.2.5.17 Marinellite! [(Na,K)42Ca6](Si36Al36O144)(SO4)8Cl2·6(H2O) P 31c or P 2c Trig |
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76.2.5.18 IMA2004-043! (Na37K9Ca10)S56(Si42Al42)S84O168(SO4)12·6(H2O) P 63/m 6/m 2/m 2/m |
Strunz Class: |
VIII/J.09-60 VIII - Silicates |
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VIII/J - Tectosilicates (network) with anions unfamiliar to the tetraheders |
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VIII/J.09 - Cancrinite group |
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VIII/J.09-05 Hydroxycancrinite Na4(AlSiO4)3(OH)·(H2O) P 63 6 |
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VIII/J.09-10 Cancrinite Na6Ca2Al6Si6O24(CO3)2 P 63 6 |
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VIII/J.09-15 Cancrisilite Na7Al5Si7O24(C03)·3(H2O) P 63 6 |
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VIII/J.09-20 Davyne Na4K2Ca2Si6Al6O24(SO4)Cl2 P 63/m 6/m |
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VIII/J.09-25 Quadridavyne (Na,K)6Ca2Al6Si6O24Cl4 P 63/m 6/m |
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VIII/J.09-30 Microsommite (Na,Ca,K)7-8(Si,Al)12O24(Cl,SO4)2-3 P 6322 6 2 2 |
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VIII/J.09-40 Giuseppettite [Na42K16Ca6]S64Si48Al48O192(SO4)10Cl2·5H2O P 31c 3m |
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VIII/J.09-45 Bystrite (Na,K)7Ca(Si6Al6)O24S4.5·(H2O) P 31c 3m |
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VIII/J.09-50 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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VIII/J.09-55 Tounkite (Na,Ca,K)8Al6Si6O24(SO4)2Cl·(H2O) P 6222 6 2 2 |
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VIII/J.09-60 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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VIII/J.09-65 Pitiglianoite Na6K2Si6Al6O24(SO4)·2(H2O) P 63 6 |
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VIII/J.09-70 Vishnevite (Na,Ca,K)6(Si,Al)12O24[(SO4),(CO3),Cl2]2-4·n(H2O) P 6322 6 2 2 |
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VIII/J.09-80 Franzinite [(Na,K)30Ca10][Si30Al30O120](SO4)10·2(H2O) P 321 3 2 |
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VIII/J.09-90 Liottite (Ca,Na,K)8(Si,Al)12O24[(SO4),(CO3),Cl,OH]4·(H2O) P 6m2 6 m2 |
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VIII/J.09-100 Wenkite Ba4Ca6(Si,Al)20O39(OH)2(SO4)3·n(H2O)(?) P 62m 6 m2 |
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Other Sacrofanite Information
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References: |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
See Also: |
Links to other databases for Sacrofanite :
1 -Am. Min. Crystal Structure Database
2 -Athena
3 - EUROmin Project
4 -Google Images
5 -Google Scholar
6 -Handbook of Mineralogy (MinSocAm)
7 -Handbook of Mineralogy (UofA)
8 -MinDAT
9 -MinMax(Deutsch)
10 -MinMax(English)
11 -Mineralienatlas (Deutsch)
12 -QUT Mineral Atlas
13 -École des Mines de Paris
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Print or Cut-and-Paste your Sacrofanite Specimen Label here :
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Sacrofanite
(Na,Ca,K)9Si6Al6O24[(OH),(SO4),(CO3),Cl)]4·n(H2O)
Dana No: 76.2.5.13 Strunz No: VIII/J.09-60
Locality:
Notes:
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