Stilbite - Desmine Composition, Crystallization & Structure

Composition. (Na₂,Ca)Al₂Si₆G0₁₆G.6H₂O.

Crystallization. Monoclinic. Uniformly in cruciform twins. Commonly tabular parallel to elinopinaeoid. Crystals usually in sheaflike aggregates.

Structure. In crystals groups, divergent or radiated.

Physical Properties. Perfect cleavage parallel to clinopinacoid. H. = 3.5--4. G. = 2.1-2.2. Vitreous luster; pearly on clinopinacoid. Color white, yellow, brown, red. Translucent.

Tests. Fuses with intumescence at 3. Decomposed by hydrochloric acid with separation of silica but without the formation of a. Water in C. T. characterized chiefly by its cleavage, pearly luster on the cleavage face and common sheaflike groups of crystals.

Occurrence. A mineral of secondary origin found in amygdaloidal cavities in basalts and related rocks. Found associated with other zeolites, calcite, etc.  notable localities for its occurrence are Poonah, India Isle of Skye; Faroe Island; Kilpatrick, Scotland; Ice land; northeastern New Jersey; Nova Scotia.

Name. derived from a Greek word meaning luster.

Mining Equipment India Sulphates - Anhydrous Sulphates, Glauberite and the Barite Group Descriptive Mineralogy, Composition, Crystallization and Structure Bismuth Flotation & Recovery Geophysics Stope and Mine Control How Much Circulating Load? Calculating circuit loads Hexagonal System, Rhombohedral Class Normal Division Instrumentation and Control of Grinding Circuits Copper Elements, Alloys and Symbols Crusher Sizing Table 1A Correct Feed Size for a Crusher Copper Composition, Crystallization, Structure and Occurrence Used Mining Equipment South Africa ZINC ACTIVATION