Ceolitas calcoalcalinas en fracturas tardias del manto de salobreña (mantos alpujarrides, cordillera betica)
- J.D. Martín Ramos 1
- J. de D. Yáñez 1
- A. Acosta 1
- E. Sebastian 1
- 1 Departamento de Cristalografía y Mineralogía de la Universidad de Granada y Sección de Mineralogía del Departamento de Investigaciones Geológicas (C.S.I.C.), Granada
ISSN: 0210-6558
Year of publication: 1982
Volume: 6
Issue: 0
Pages: 33-47
Type: Article
More publications in: Boletín de la Sociedad Española de Mineralogía
Abstract
Beautiful assemblage of well-formad crystals of zeolites are found in Jete (Salobreña nape, Betic Range, Spain). Routine examination of x-ray diffractomerter show that the studied zeolites are a pathers similar to chabazite and sodium stilbite. The refined paramétrés are: stilbite, a = 13,683 (2) Å, c = 15,00 (8) Å, β = 129 ,1 (1).; chabazite, a=b = 13,8 18 (4) Å, c = 15,00 (8) Å, α= β =90', γ=120'. Three samples of the zeolites, selected to avoid as many impurities as possible, were separad manualy to chemical, DTG and diffractometric analysis. The final separations contained more 99.5 per cent chabazite or sodium stilbite. The chemical analysis and content of the unit cell based on 72 oxigens are given. X-ray data are discussed. An upper formation temperature limit of 60 to 7 5 °C under 50 b pressure are calculated.