The ordering behaviour of albite in aqueous solutions at 1 kbar

✍ Scribed by R. A. Mason

• Publisher: Springer
• Year: 1979
• Tongue: English
• Weight: 434 KB
• Volume: 68
• Category: Article
• ISSN: 0010-7999
• DOI: 10.1007/bf00371547

✦ Synopsis

Albite crystallized hydrothermally from gels of Ablo0 and Ab9o (SiO2)1o (wt %) composition changes in degree of A1, Si order with time to reach a steady value. The steady values are influenced by fluid and gel composition as well as temperature. A1bites grown in long experiments in the presence of NaOH and excess SiO 2 are more ordered than albites grown in similar experiments with pure water and excess SiO 2. This 'catalytic' effect declines as temperature is increased above 600 ~ C.'Partially ordered albites heated hydrothermally at 700 ~ and 725 ~ C decrease in degree of order. When heated at 600 ~ , 650 ~ or 675~ the degree of order either increases very slightly, or remains the same depending on the degree of order initially present.