Liottite Mineral Data

Liottite Mineral Data +

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General Liottite Information

Chemical Formula:

(Ca,Na,K)8(Si,Al)12O24[(SO4),(CO3),Cl,OH]4·(H2O)

Composition:

Molecular Weight = 1,204.89 gm

Potassium 4.22 % K 5.08 % K₂O

Sodium 5.91 % Na 7.97 % Na₂O

Calcium 11.97 % Ca 16.75 % CaO

Aluminum 13.21 % Al 24.96 % Al₂O₃

Silicon 14.22 % Si 30.42 % SiO₂

Hydrogen 0.20 % H 1.79 % H₂O

Carbon 0.60 % C 2.19 % CO₂

Sulfur 3.46 % S 8.64 % SO₃

Chlorine 2.65 % Cl 2.65 % Cl

- % Cl -0.60 % -O=Cl₂

Oxygen 43.55 % O

______ ______

100.00 % 99.87 % = TOTAL OXIDE

Empirical Formula:

Ca_3.6Na_3.1K_1.3Si_6.1Al_5.9O₂₄(SO₄)_1.3Cl_0.9(CO₃)_0.6(OH)_1.2·0.6(H₂O)

Environment:

In cavities in ejecta blocks of metasomatized carbonate rocks in a pumice deposit.

IMA Status:

Approved IMA 1977

Locality:

At Pitigliano, near Grosseto, Tuscany, Italy. Link to MinDat.org Location Data.

Name Origin:

Named for Luciano Liotti, mineral collector who donated the specimen in which this mineral was first found.

Synonym:

ICSD 82468

PDF 47-1742

Liottite Image

Images:

Liottite

Comments: Transparent colorless liottite crystal on vesuvianite.
Location: Pitigliano, Grosseto, Tuscany, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Liottite Crystallography

Axial Ratios:

a:c = 1:1.25299

Cell Dimensions:

a = 12.842, c = 16.091, Z = 3; V = 2,298.15 Den(Calc)= 2.61

Crystal System:

Hexagonal - Ditrigonal DipyramidalH-M Symbol (6 m2) Space Group: P 6m2

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

By Intensity(I/I_o): 3.715(1), 3.315(0.75), 4.84(0.36),

Crystal Structure:

Mouse
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
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Ballirano P , Merlino S , Bonaccorsi E , Maras A , The Canadian Mineralogist , 34 (1996) p.1021-1030, The crystal structure of liottite, a six-layer member of the cancrinite group

Physical Properties of Liottite

Cleavage:

None

Color:

Colorless.

Density:

2.56

Diaphaniety:

Transparent

Habit:

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

Hardness:

5 - Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Liottite

Gladstone-Dale:

CI meas= 0.014 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.033 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2027,KPDmeas= 0.2066,KC= 0.2096

Optical Data:

Uniaxial (-), e=1.528, w=1.53, bire=0.0020.

Calculated Properties of Liottite

Electron Density:

r_electron=2.54 gm/cc
note: r_Liottite=2.56 gm/cc.

Fermion Index

Fermion Index = 0.00734
Boson Index = 0.99266

Photoelectric:

PE_Liottite= 3.31 barns/electron
U=PE_Liottite x r_electron= 8.41 barns/cc.

Radioactivity:

GRapi = 60.35 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Liottite - barely detectable

Liottite Classification

Dana Class:

76.2.5.9 (76)Tectosilicate Al-Si Framework

(76.2)Feldspathoids and related species

(76.2.5)Cancrinite group

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

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

76.2.5.3 Cancrinite Na6Ca2Al6Si6O24(CO3)2 P 6₃ 6

76.2.5.4 Cancrisilite Na7Al5Si7O24(C03)·3(H2O) P 6₃ 6

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

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

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

76.2.5.8 Hydroxycancrinite Na4(AlSiO4)3(OH)·(H2O) P 6₃ 6

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

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

76.2.5.11 Pitiglianoite Na6K2Si6Al6O24(SO4)·2(H2O) P 6₃ 6

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

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

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

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

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

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

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.09-90 VIII - Silicates

VIII/J - Tectosilicates (network) with anions unfamiliar to the tetraheders

VIII/J.09 - Cancrinite group

VIII/J.09-05 Hydroxycancrinite Na4(AlSiO4)3(OH)·(H2O) P 6₃ 6

VIII/J.09-10 Cancrinite Na6Ca2Al6Si6O24(CO3)2 P 6₃ 6

VIII/J.09-15 Cancrisilite Na7Al5Si7O24(C03)·3(H2O) P 6₃ 6

VIII/J.09-20 Davyne Na4K2Ca2Si6Al6O24(SO4)Cl2 P 6₃/m 6/m

VIII/J.09-25 Quadridavyne (Na,K)6Ca2Al6Si6O24Cl4 P 6₃/m 6/m

VIII/J.09-30 Microsommite (Na,Ca,K)7-8(Si,Al)12O24(Cl,SO4)2-3 P 6₃22 6 2 2

VIII/J.09-40 Giuseppettite [Na42K16Ca6]S64Si48Al48O192(SO4)10Cl2·5H2O P 3₁c 3m

VIII/J.09-45 Bystrite (Na,K)7Ca(Si6Al6)O24S4.5·(H2O) P 3₁c 3m

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

VIII/J.09-55 Tounkite (Na,Ca,K)8Al6Si6O24(SO4)2Cl·(H2O) P 6₂22 6 2 2

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

VIII/J.09-65 Pitiglianoite Na6K2Si6Al6O24(SO4)·2(H2O) P 6₃ 6

VIII/J.09-70 Vishnevite (Na,Ca,K)6(Si,Al)12O24[(SO4),(CO3),Cl2]2-4·n(H2O) P 6₃22 6 2 2

VIII/J.09-80 Franzinite [(Na,K)30Ca10][Si30Al30O120](SO4)10·2(H2O) P 3₂1 3 2

VIII/J.09-90 Liottite (Ca,Na,K)8(Si,Al)12O24[(SO4),(CO3),Cl,OH]4·(H2O) P 6m2 6 m2

VIII/J.09-100 Wenkite Ba4Ca6(Si,Al)20O39(OH)2(SO4)3·n(H2O)(?) P 62m 6 m2

Other Liottite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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Print or Cut-and-Paste your Liottite Specimen Label here :

Liottite

(Ca,Na,K)8(Si,Al)12O24[(SO4),(CO3),Cl,OH]4·(H2O)
Dana No: 76.2.5.9 Strunz No: VIII/J.09-90
Locality:

Notes: