Classification sorts earth materials by their formal mineral family. Wikipedia notes that quartz "is classified structurally as a framework silicate mineral and compositionally as an oxide mineral," two different systems applied to the same substance. This dimension lets a visitor compare materials that mineralogists group together for the same technical reason.
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Comparison
Formation OriginContain the tetrahedrally coordinated phosphate (PO4 3-) anion, sometimes with arsenate or vanadate substitution. 1 Phosphate Mineral
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Classifies
Entity-backed identity for the material classification this material already carries as an enum fact, pointing at the class subcategory of the same name. The enum fact itself stays on the entity unchanged.
Entity-backed identity for the material classification this material already carries as an enum fact, pointing at the class subcategory of the same name. The enum fact itself stays on the entity unchanged.
Sources
1. Wikipedia: Phosphate minerals
WikipediaPhosphate minerals, lead sectionQuote, Phosphate minerals, lead section
Phosphate minerals are minerals that contain the tetrahedrally coordinated phosphate (PO3-4) anion, sometimes with arsenate (AsO3-4) and vanadate (VO3-4) substitutions, along with chloride (Cl-), fluoride (F-), and hydroxide (OH-) anions, that also fit into the crystal structure.
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