Sodian stellerite from Capo Pula,Sardegna |
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| Authors: | E. Passaglia D. Pongiluppi |
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| Affiliation: | Istituto di Mineralogia e Petrologia, Università di Modena, via S. Eufemia 19, 41100 Modena, Italy |
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| Abstract: | The sodian stellerite (a zeolite) occurs as lustrous white or slightly pink, easily cleavable lamellae, filling cavities and fractures in an acid lava (andesite or rhyolite) in the cliff below S. Efisio Tower, near Capo Pula, Cagliari, Sardegna, Italy. The principal forms present are {010}, {011}, {111}. Single crystal photographs show an orthorhombic symmetry and Ammm (or Ammm) space group. An indexed X-ray diffraction powder pattern is provided. Unit cell dimensions, chemical formula, density, optical properties and thermal behaviour are given. |
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