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Terranovaite from Antarctica; a new "pentasil" zeolite

Ermanno Galli, Simona Quartieri, Giovanna Vezzalini, Alberto Alberti and Marco Franzini
Terranovaite from Antarctica; a new "pentasil" zeolite
American Mineralogist (April 1997) 82 (3-4): 423-429


A new high-silica zeolite, terranovaite, was recently found in cavities of Ferrar dolerites at Mt. Adamson (Northern Victoria Land, Antarctica). The mineral [(Na (sub 4.2) K (sub 0.2) Mg (sub 0.2) Ca (sub 3.7) ) (sub Sigma 8.3) (Al (sub 12.3) Si (sub 67.7) ) (sub Sigma 80.0) O (sub 160) .>29 H (sub 2) O] occurs as globular masses that flake off in transparent lamellae; it has a vitreous luster, white streak, {010} perfect cleavage, and {001} distinct parting. The observed density is 2.13+ or -0.02 g/cm (super 3) . Optically, it is biaxial positive, with 2V = 65 degrees , alpha = 1.476, beta = 1.478, gamma = 1.483 (all + or -0.002). The orientation is X = c, Y = a, and Z = b. Terranovaite is orthorhombic with a = 9.747(1), b = 23.880(2), c = 20.068(2) Aa and topological symmetry Cmcm. The strongest powder X-ray diffraction lines are (d (Aa), I, hkl): 11.94,40,020; 10.16,65,021,002; 9.04,33,110; 3.79,100,025,240; 3.61,40,153. Terranovaite topology, hitherto unknown in either natural or synthetic zeolites, is characterized by the presence of pentasil chains and of a two-dimensional ten-membered ring channel system. The mineral was named terranovaite after the Italian Antarctic Station at Terranova Bay, Antarctica.

ISSN: 0003-004X
EISSN: 1945-3027
Serial Title: American Mineralogist
Serial Volume: 82
Serial Issue: 3-4
Title: Terranovaite from Antarctica; a new "pentasil" zeolite
Affiliation: Universita di Modena, Dipartimento di Scienze della Terra, Modena, Italy
Pages: 423-429
Published: 199704
Text Language: English
Publisher: Mineralogical Society of America, Washington, DC, United States
References: 21
Accession Number: 1997-042345
Categories: Mineralogy of silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: 4 tables
Secondary Affiliation: Universita di Ferrara, ITA, ItalyUniversita di Pisa, ITA, Italy
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute.
Update Code: 199715
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