'''Lead apatite''' is a generic name for apatite-structure materials that contain lead as the divalent cation. A Copper-doped lead-apatite has been proposed as a room-temperature superconductor. A number of minerals are known. All have a hexagonal crystal structure.
==Minerals== {|class="wikitable" !name !formula !unit cell Å !a : c !volume !density !reference ! |- |Fluorpyromorphite |Pb<sub>5</sub>(PO<sub>4</sub>)<sub>3</sub>F |a = 9.779 c = 7.241 |1 : 0.74 |599.68 | |<ref>{{cite web |title=Fluorpyromorphite |url=https://www.mindat.org/min-56022.html |access-date=8 August 2023}}</ref> | |- |Pyromorphite |Pb<sub>5</sub>(PO<sub>4</sub>)<sub>3</sub>Cl |a = 9.987 c = 7.33 |1 : 0.734 |633.15 |7.04 |<ref>{{cite web |title=Pyromorphite |url=https://www.mindat.org/min-3320.html}}</ref> |thumb |- |Hydroxylpyromorphite |Pb<sub>5</sub>(PO<sub>4</sub>)<sub>3</sub>OH |a = 9.787 c = 7.307 |1: 0.747 |606.13 |7.32 |<ref>{{cite web |title=Hydroxylpyromorphite |url=https://www.mindat.org/min-31566.html}}</ref> | |- |Oxypyromorphite |Pb<sub>10</sub>(PO<sub>4</sub>)<sub>6</sub>O | | | | |<ref>{{cite web |title=Oxypyromorphite |url=https://www.mindat.org/min-3052.html |access-date=8 August 2023}}</ref> | |- |Mimetite |Pb<sub>5</sub>(AsO<sub>4</sub>)<sub>3</sub>Cl |a = 10.250 c = 7.454 |1 : 0.727 |678.22 |7.24 |<ref>{{cite web |title=Mimetite |url=https://www.mindat.org/min-2714.html |access-date=8 August 2023}}</ref> |thumb |- | |Pb<sub>5</sub>(AsO<sub>4</sub>)<sub>3</sub>OH |a = 10.1266 c = 7.5010 |1 : 0.741 |666.16 | |<ref>{{Cite web |title=Unnamed (OH-analogue of Mimetite) |url=https://www.mindat.org/min-44420.html}}</ref> | |- |Vanadinite |Pb<sub>5</sub>(VO<sub>4</sub>)<sub>3</sub>Cl |a = 10.3174 c = 7.3378 |1 : 0.711 |676.45 |6.88 |<ref>{{Cite web |title=Vanadinite |url=https://www.mindat.org/min-4139.html}}</ref> |thumb |- |Germanate-pyromorphite |Pb<sub>5</sub>(PO<sub>4</sub>)<sub>2</sub>GeO<sub>4</sub> | | | | |<ref>{{Cite web |title=Germanate-pyromorphite |url=https://www.mindat.org/min-9374.html}}</ref> | |- |Phosphohedyphane |Ca<sub>2</sub>Pb<sub>3</sub>(PO<sub>4</sub>)<sub>3</sub>Cl |a = 9.857 Å, c = 7.13 |1 : 0.723 |599.9 |5.92 |<ref>{{Cite web |title=Phosphohedyphane |url=https://www.mindat.org/min-27608.html}}</ref> |thumb |- |Hedyphane |Ca<sub>2</sub>Pb<sub>3</sub>(AsO<sub>4</sub>)<sub>3</sub>Cl |a = 10.14 c = 7.185 |1 : 0.798 |639.78 |5.82 |<ref>{{Cite web |title=Hedyphane |url=https://www.mindat.org/min-1844.html}}</ref> |thumb |- |Hydroxylhedyphane |Ca<sub>2</sub>Pb<sub>3</sub>(AsO<sub>4</sub>)<sub>3</sub>(OH) |a = 10.0414 c = 7.2752 |1 : 0.725 |635.28 | |<ref>{{Cite web |title=Hydroxylhedyphane |url=https://www.mindat.org/min-47415.html}}</ref> |? |- |Vanackerite |Pb<sub>4</sub>Cd(AsO<sub>4</sub>)<sub>3</sub>Cl |a = 10.0279 c = 7.2965 |1 : 0.728 |635.43 |7.28 |<ref>{{Cite web |title=Vanackerite |url=https://www.mindat.org/min-42744.html}}</ref> | |}
==References== {{Reflist}}
Category:Lead compounds Category:Crystals in space group 176 Category:Calcium minerals Category:Gemstones Category:Halide minerals Category:Hexagonal minerals Category:Minerals in space group 176 Category:Phosphate minerals Category:Piezoelectric materials