Definition of Pinacoid. Meaning of Pinacoid. Synonyms of Pinacoid

- cleavage is mica, which cleaves in a single direction along the basal pinacoid, making the layers seem like pages in a book. In fact, mineralogists often...
- intersect at about 120 degrees in a three-fold direction of the basal pinacoid. Black star sapphire is found in Thailand, Cambodia, Tanzania, Australia...
- tabular to prismatic crystals with an obvious pinacoid termination. It has four prism faces and two pinacoid faces to form a pseudohexagonal crystal. Although...
- are generally tabular in habit owing to the predominance of the basal pinacoid; numerous smooth bright faces are often developed on the edges and corners...
- Predominant crystal faces (prism - prismatic, pyramid - pyramidal and pinacoid - platy). Crystal forms (cubic, octahedral, dodecahedral). Aggregation...
- intergrown. Crystals are squat and when single tend to lie on the basal pinacoid. The pinacoid {001} and the dipyramid {113} are the dominant forms; all the faces...
- a nearly square cross-section formed by the equal development of two pinacoids. The crystals are about 1–3 μm thick and 50–80 μm long, arranged in loosely...
- parallel to their length between crossed nicol prisms. Twinning on the ortho-pinacoid is usually evident. The structure of the aluminosilicate framework is the...
- plates, or short prisms, showing hexagonal dipyramids, pyramids and basal pinacoid. {1010}, {1011} and {0001} dominant. May also be tabular or rhombohedral...
- faces, also as tapering six-sided pyramids that can be truncated by the pinacoids. Also m****ive, lamellar and in small grains in sulfide ore bodies Cleavage...