Terranovaite Mineral Data

Terranovaite Mineral Data +

General Terranovaite Information

Chemical Formula:

(Na,Ca)8(Si68Al12)O160-29(H2O)

Composition:

Molecular Weight = 5,573.13 gm

Potassium 0.14 % K 0.17 % K₂O

Sodium 1.73 % Na 2.34 % Na₂O

Calcium 2.66 % Ca 3.72 % CaO

Magnesium 0.09 % Mg 0.14 % MgO

Aluminum 5.95 % Al 11.25 % Al₂O₃

Silicon 34.12 % Si 72.99 % SiO₂

Hydrogen 1.05 % H 9.37 % H₂O

Oxygen 54.26 % O

______ ______

100.00 % 99.99 % = TOTAL OXIDE

Empirical Formula:

Na_4.2K_0.2Mg_0.2Ca_3.7Al_12.3Si_67.7O₁₆₀·29(H₂O)

Environment:

In cavities in dolorites.

IMA Status:

Approved IMA 1997 (Dana # Added)

Locality:

The southwest crest, just below the summit of Mt. Adamson, Northern Victoria Land, Antarctica. Link to MinDat.org Location Data.

Name Origin:

For the Italian Antarctic Station at Terranova Bay, Antarctica.

Synonym:

ICSD 83466

IMA1995-026

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Terranovaite Crystallography

Axial Ratios:

a:b:c =0.4081:1:0.8403

Cell Dimensions:

a = 9.747, b = 23.88, c = 20.068, Z = 1; V = 4,670.99 Den(Calc)= 1.98

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: C mcm

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

By Intensity(I/I_o): 3.79(1)(025,240), 10.16(0.65)(002), 11.94(0.4)(020),3.61(0.4)(153), 9.04(0.33)(110),

Forms:

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Crystal Structure:

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Galli E , Quartieri S , Vezzalini G , Alberti A , Franzini M , American Mineralogist , 82 (1997) p.423-429, Terranovaite from Antarctica: A new pentasil zeolite

Physical Properties of Terranovaite

Cleavage:

[010] Perfect, [001] Parting

Color:

Colorless, Bluish white.

Density:

1.98 - 2.13, Average = 2.05

Diaphaniety:

Transparent

Fracture:

Brittle - Irregular - Very brittle fracture producing irregular fragments

Habit:

Globular - Spherical, or nearly so, rounded forms (e.g. wavellite).

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Terranovaite

Gladstone-Dale:

CI meas= -0.06 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.1 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2419,KPDmeas= 0.2331,KC= 0.2199

Optical Data:

Biaxial (+), a=1.476, b=1.478, g=1.483, bire=0.0070

Calculated Properties of Terranovaite

Electron Density:

r_electron=2.07 gm/cc
note: r_Terranovaite=2.06 gm/cc.

Fermion Index

Fermion Index = 0.01631
Boson Index = 0.98369

Photoelectric:

PE_Terranovaite= 1.87 barns/electron
U=PE_Terranovaite x r_electron= 3.87 barns/cc.

Radioactivity:

GRapi = 2.06 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Terranovaite - barely detectable

Terranovaite Classification

Dana Class:

77.1.6.9 (77)Tectosilicate Zeolite group

(77.1)true zeolites

(77.1.6)Mordenite and related species

77.1.6.1 Mordenite (Ca,Na2,K2)Al2Si10O24·7(H2O) C mc2₁ mm2

77.1.6.2 Epistilbite CaAl2Si6O16·5(H2O) C1 1

77.1.6.3 Maricopaite Pb7Ca2(Si,Al)48O100·32(H2O) Cm2m 2/m 2/m 2/m

77.1.6.4 Dachiardite-Ca (Ca,Na2,K2)5Al10Si38O96·25(H2O) C 2/m 2/m

77.1.6.5 Dachiardite-Na (Na2,Ca,K2)4Al4Si20O48·13(H2O) C 2/m 2/m

77.1.6.6 Ferrierite-Mg (Mg,Na,K)2Mg(Si,Al)18O36·9(H2O) Pnnm 2/m 2/m 2/m

77.1.6.6a Ferrierite-K! (K,Na)2Mg(Si,Al)18O36·9(H2O) Pnnm 2/m 2/m 2/m

77.1.6.6b Ferrierite-Na! (Na,K)2Mg(Si,Al)18O36·9(H2O) P 2₁/n 2/m 2/m 2/m

77.1.6.7 Boggsite NaCa2(Al5Si19O48)·17(H2O) I mma 2/m 2/m 2/m

77.1.6.8 Gottardiite! Na3Mg3Ca5Al19Si117O272·93(H2O) C mca 2/m 2/m 2/m

77.1.6.9 Terranovaite ! (Na,Ca)8(Si68Al12)O160-29(H2O) C mcm 2/m 2/m 2/m

77.1.6.10 Mutinaite! Na3Ca4Si85Al11O192·60(H2O) P nma 2/m 2/m 2/m

Strunz Class:

VIII/J.22-07 VIII - Silicates

VIII/J - Tectosilicates (network), with zeolite-structure, Bladed Zeolites

VIII/J.22 - Zeolite group, Ferrierite - Laumontite series

VIII/J.22-01 Ferrierite-Na! (Na,K)2Mg(Si,Al)18O36·9(H2O) P 2₁/n 2/m 2/m 2/m

VIII/J.22-03 Ferrierite-K! (K,Na)2Mg(Si,Al)18O36·9(H2O) Pnnm 2/m 2/m 2/m

VIII/J.22-05 Ferrierite-Mg (Mg,Na,K)2Mg(Si,Al)18O36·9(H2O) Pnnm 2/m 2/m 2/m

VIII/J.22-06 Mutinaite! Na3Ca4Si85Al11O192·60(H2O) P nma 2/m 2/m 2/m

VIII/J.22-07 Terranovaite (Na,Ca)8(Si68Al12)O160-29(H2O) C mcm 2/m 2/m 2/m

VIII/J.22-08 Gottardiite! Na3Mg3Ca5Al19Si117O272·93(H2O) C mca 2/m 2/m 2/m

VIII/J.22-10 Boggsite NaCa2(Al5Si19O48)·17(H2O) I mma 2/m 2/m 2/m

VIII/J.22-15 Dachiardite-Na (Na2,Ca,K2)4Al4Si20O48·13(H2O) C 2/m 2/m

VIII/J.22-20 Dachiardite-Ca (Ca,Na2,K2)5Al10Si38O96·25(H2O) C 2/m 2/m

VIII/J.22-30 Mordenite (Ca,Na2,K2)Al2Si10O24·7(H2O) C mc2₁ mm2

VIII/J.22-40 Edingtonite BaAl2Si3O10·4(H2O) P 2₁2₁2 2 2 2

VIII/J.22-50 Laumontite CaAl2Si4O12·4(H2O) C 2/m 2/m

Other Terranovaite Information

References:

NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.82,p423-429,1997) OPTIC PROP.(MinRec)

See Also:

Links to other databases for Terranovaite :
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 10 - WWW-MINCRYST

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Terranovaite

(Na,Ca)8(Si68Al12)O160-29(H2O)
Dana No: 77.1.6.9 Strunz No: VIII/J.22-07
Locality:

Notes: