Levynes and erionites from Sardinia, Italy

✍ Scribed by E. Passaglia; E. Galli; R. Rinaldi

• Publisher: Springer
• Year: 1974
• Tongue: English
• Weight: 825 KB
• Volume: 43
• Category: Article
• ISSN: 0010-7999
• DOI: 10.1007/bf00373482

✦ Synopsis

Three samples of levyne and two of erionite from three different localities of Sardinia are described. In two samples, levyne and erionite are intergrown by epitaxy. The levynes exhibit close chemical compositions with Ca>Na>K; as for their lattice constants, a is very similar in all three samples, while c of one sample is rather smaller than that of the other two. Unit cell dimensions of both erionites and chemical composition of one are also given. In addition, the following data are reported for the levynes: refractive indices for all three samples, density for two and DTA for one. The existence of levyne-erionite intergrowth is emphasized, and support is given to the idea that this intergrowth is much more common than the literature would suggest.