Marinellite Mineral Data

Marinellite Mineral Data

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General Marinellite Information

Chemical Formula:

[(Na,K)42Ca6](Si36Al36O144)(SO4)8Cl2·6(H2O)

Composition:

Molecular Weight = 6,673.61 gm

Potassium 6.59 % K 7.94 % K₂O

Sodium 11.09 % Na 14.95 % Na₂O

Calcium 3.68 % Ca 5.14 % CaO

Aluminum 14.71 % Al 27.80 % Al₂O₃

Silicon 15.30 % Si 32.73 % SiO₂

Hydrogen 0.10 % H 0.93 % H₂O

Sulfur 3.94 % S 9.84 % SO₃

Chlorine 0.87 % Cl 0.87 % Cl

- % Cl -0.20 % -O=Cl₂

Oxygen 43.72 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na_32.19K_11.25Ca_6.12Si_36.35Al_36.39O_146.12(SO₄)_8.2Cl_1.64·3.44(H₂O)

Environment:

In an ejected volcanic block. Cancrinite-sodalite group; structure discussed.

IMA Status:

Approved IMA 2003 (Dana # Added)

Locality:

Sacrofano, Biacchella Valley, Latium, Italy Link to MinDat.org Location Data.

Name Origin:

Named for Giorgio Marinelli (1922-1993), Professor, Department of Earth Sciences, University of Pisa, specialist in magma genesis and tectonic settings.

Synonym:

IMA2002-021

Search for Marinellite Images

Images:

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Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Marinellite Crystallography

Axial Ratios:

a:c = 1:2.46591

Cell Dimensions:

a = 12.88, c = 31.761, Z = 1; V = 4,563.07 Den(Calc)= 2.43

Crystal System:

TrigonalSpace Group: P 3₁c or P 2c

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

By Intensity(I/I_o): 3.725(1)(214), 3.513(0.8)(215), 4.2(0.42)(210),2.15(0.4)(330), 3.089(0.4)(217), 2.555(0.35)(405), 3.296(0.35)(216),

Crystal Structure:

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Bonaccorsi E , Orlandi P , European Journal of Mineralogy , 15 (2003) p.1019-1027, Marinellite, a new feldspathoid of the cancrinite-sodalite group

Physical Properties of Marinellite

Cleavage:

[001] Poor

Color:

Colorless.

Density:

2.405

Diaphaniety:

Transparent

Fracture:

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

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Hardness:

5.5 - Knife Blade

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Marinellite

Gladstone-Dale:

CI meas= -0.012 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.002 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2041,KPDmeas= 0.2062,KC= 0.2037

Optical Data:

Uniaxial (+), w=1.495, e=1.497, bire=0.0020.

Calculated Properties of Marinellite

Electron Density:

r_electron=2.40 gm/cc
note: r_Marinellite=2.43 gm/cc.

Fermion Index

Fermion Index = 0.0077
Boson Index = 0.9923

Photoelectric:

PE_Marinellite= 2.60 barns/electron
U=PE_Marinellite x r_electron= 6.25 barns/cc.

Radioactivity:

GRapi = 93.96 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Marinellite - barely detectable

Marinellite Classification

Dana Class:

76.2.5.17 (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/JX.00-00 VIII - Silicates

VIII/JX - Unclassified Strunz Tectosilicates

VIII/JX.00 - Cancrinite-sodalite group

Other Marinellite Information

References:

NAME( CanMin, 42:1248) PHYS. PROP.(CanMin, 42:1248) OPTIC PROP.(CanMin, 42:1248)

See Also:

Links to other databases for Marinellite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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

Marinellite

[(Na,K)42Ca6](Si36Al36O144)(SO4)8Cl2·6(H2O)
Dana No: 76.2.5.17 Strunz No: VIII/JX.00-00
Locality:

Notes: