Thomsonite, mesolite, and chabazite from Golden, Colorado

زئولیت‌های پُر‌کننده‌ی حفره‌ها و بادامک‌ها در سنگ‌های آتشفشانی شمال‌غرب کوه دوازده امام، شمال ایران‌مرکزی

The north western part of volcano-sedimentary complex of Davazdah-Emam mountain in north of Central Iran is located about 135 km SE Tehran. The Eocene to Oligocene volcanic rocks and dikes of intermediate to mainly basic of complex under the influence of hydrothermal fluids, probably associated with the involvement of meteoric water, experienced different degrees of alteration. The alteration o...

A Physical Mixture of Chabazite and Offretite

Zeolite Phi is synthesized by two methods reported previously. Results from X-ray powder diffraction and scanning electron microscopy suggest that t h e materials are physical mixtures of chabazite and offretite; one sample has a small amount of phillipsite. The X-ray powder diffraction data from these samples, and those reported previously, are indexed and their unit-cell parameters compare we...

[university of Colorado at Colorado Springs,colorado Springs, Colorado]

Persia and the Golden Rule

My paper has two parts. First, I talk about the golden rule. After introducing the rule and its global importance, I explain why many scholars dismiss it as a vague proverb that leads to absurdities when we try to formulate it clearly. I defend the golden rule against such objections. Second, I talk about the golden rule in Persia and Islam; I consider Persian sources (Muslim and non-Muslim) an...

کانی‌شناسی، ترکیب شیمیایی و چگونگی تشکیل زئولیت نوع تامسونیت در گدازه‌های مافیک منطقه‌ی حرمک (شمال زاهدان، شرق ایران)

Thomsonite along with other zeolite minerals such as natrolite, mesolite, analcime and rarely stellerite in cavities and veins of mafic alkaline lavas in Hormak area, north of Zahedan, eastern Iran, is formed in there distinct habits of blocky, bladed, and waxy-growth. Chemical composition of Hormak thamsonite is reasonably comparable with those of other reported thomsonites. Si/Al ratio of the...