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Types and varieties. The principal types of natural graphite, each occurring in different types of ore deposits are: . Crystalline small flakes of graphite (or flake graphite) occurs as isolated, flat, platelike particles with hexagonal edges if unbroken. When broken the edges can be irregular or angular;
Zinc processing: Zinc processing, the extraction of zinc from its ores and the preparation of zinc metal or chemical compounds for use in various products. Zinc (Zn) is a metallic element of hexagonal closepacked (hcp) crystal structure and a density of grams per cubic centimetre. It has only moderate
SBB's steel glossary is great for finding the definition for any steel term associated to the industry.
"Demandite" is the word used by mineral economists to describe the materials that must be provided— usually by mining— to meet the needs of civilization.