Datolite Composition, Crystallization & Structure
Composition. A basic orthosilicate of calcium and boron, Ca (B.OH)SiO4 = Silica 37.6, boron trioxide 21.8, lime 35, water 5.6.
Crystallization. Monoclinic. Habit varied. Crystals usually nearly equidimesional in the three axial directions and often complex in development.
Structure. In crystals. Coarse to fine granular. Sometimes compact.
Physical Properties. H = 5-5.5. G. = 2.8-3. vitreous luster. Colorless, white, yellow. Often with fain greenish tinge. Transparent to translucent, rarely opaque.
Test. Fused at 2-2.5 to a clear glass and colors the flame green (boron). Soluble in hydrochloric acid and yields gelatinous silica on evaporation. Gives a little water in C. T. Characterized by its glassy luster, pale green color, and its crystals with many and usually irregularly developed faces.
Occurrence. A mineral of secondary origin, found usually in cavities in basalt lavas and similar rocks. Associated with the various zeolites, with calcite, phenite, etc. Occurs associated with the trap rocks of Massachusetts, Connecticut and new Jersey, particularly at Westfield, with the copper deposits of Lake Superior. From Andreasberg, Harz; Mts; in Italy from near bologna; from the Seizer Alpe and at Theist, Trentino; Arendal, Norway; etc.
Name. Derived from a Greek word meaning to divide, alluding to the granular structure of a massive variety.
A rare mineral belonging to the Datolite Group is gadolinite, Be3FeY2Si2O10.
Fusion by Means of Blowpipe Flame Titanium Element, Alloys and Symbols Accessory Rock-making Minerals Primary Crusher Product Other Methods of Drilling Kaolin or Kaolinite Composition, Crystallization & Structure Mining Glossary Triclinic System, Crystallographic Axes, Symmetry and Forms Mining Equipment Europe Types of Rock Crushers Stratabound Massive Sulphides Crushing Cavity Design Mining Glossary F Chromite Composition, Crystallization & Structure Franklinite Composition, Crystallization & Structure
