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Hydroxyapatite (IMA name: hydroxylapatite [5]) (Hap, HAp, or HA) is a naturally occurring mineral form of calcium apatite with the formula Ca 5 (PO 4) 3 (OH), often written Ca 10 (PO 4) 6 (OH) 2 to denote that the crystal unit cell comprises two entities. [6] It is the hydroxyl endmember of the complex apatite group.
This layer is called a mixed carbonated hydroxyl apatite (HCA). Growth factors adsorb to the surface of Bioglass due to its structural and chemical similarities to hydroxyapatite. Adsorbed growth factors cause the activation of M2 macrophages. M2 macrophages tend to promote wound healing and initiate the migration of progenitor cells to an ...
Apatite is the defining mineral for 5 on the Mohs scale. [11] It can be distinguished in the field from beryl and tourmaline by its relative softness. It is often fluorescent under ultraviolet light. [12] Apatite is one of a few minerals produced and used by biological micro-environmental systems. [7]
The two main sources for phosphate are guano, formed from bird or bat droppings, and rocks containing concentrations of the calcium phosphate mineral, apatite. As of 2006 [update] , the US is the world's leading producer and exporter of phosphate fertilizers, accounting for about 37% of world P 2 O 5 exports. [ 13 ]
Bone mineral (also called inorganic bone phase, bone salt, or bone apatite) is the inorganic component of bone tissue. It gives bones their compressive strength . Bone mineral is formed predominantly from carbonated hydroxyapatite [ 1 ] [ 2 ] with lower crystallinity.
The grouping of the New Dana Classification and of the mindat.org is similar only, and so this classification is an overview only. Consistency is missing too on the group name endings (group, subgroup, series) between New Dana Classification and mindat.org. Category, class and supergroup name endings are used as layout tools in the list as well.
Biagioni C, Bosi F, Hålenius U, Pasero M (2017) The crystal structure of turneaureite, Ca5(AsO4)3Cl, the arsenate analog of chlorapatite, and its relationships with the arsenate apatites johnbaumite and svabite, American Mineralogist, 102, 1981–1986
Milwaukee shoulder syndrome (MSS) (apatite-associated destructive arthritis/Basic calcium phosphate (BCP) crystal arthritis/rapid destructive arthritis of the shoulder) [1] is a rare [2] rheumatological condition similar to pseudogout, associated with periarticular or intra-articular deposition of hydroxyapatite or basic calcium phosphate (BCP) crystals.
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