Crystal system groups minerals by the internal atomic pattern their crystals repeat. Wikipedia notes that "quartz exists in two forms, the normal alpha-quartz and the high-temperature beta-quartz, both of which are chiral," each with its own geometric structure. This dimension lets a visitor compare minerals that share the same underlying crystal geometry.
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Comparison
Formation OriginContain the tetrahedrally coordinated phosphate (PO4 3-) anion, sometimes with arsenate or vanadate substitution. 1 Triclinic
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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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