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Unnamed (OH-analogue of Mimetite)
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About Unnamed (OH-analogue of Mimetite)
Currently the chemistry is only inferred from SEM-EDS analyses which gave a mimetite-type formula, but without any Cl (Schachinger et al., 2014). The same specimen also contained "normal" mimetite.
An OH end-member was also detected in the Black Forest, Germany (Markl et al., 2014).
Known as a synthetic phase.
An OH end-member was also detected in the Black Forest, Germany (Markl et al., 2014).
Known as a synthetic phase.
Unique Identifiers
Mindat ID:
44420
Long-form identifier:
mindat:1:1:44420:0
Classification of Unnamed (OH-analogue of Mimetite)
8.BN.05
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
N : With only large cations, (OH, etc.):RO4 = 0.33:1
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
N : With only large cations, (OH, etc.):RO4 = 0.33:1
Chemistry of Unnamed (OH-analogue of Mimetite)
Mindat Formula:
Pb5(AsO4)3(OH)
Element Weights:
Elements listed:
Crystallography of Unnamed (OH-analogue of Mimetite)
Crystal System:
Hexagonal
Class (H-M):
6/m - Dipyramidal
Space Group:
P63/m
Cell Parameters:
a = 10.1266(3) Å, c = 7.5010(2) Å
Ratio:
a:c = 1 : 0.741
Unit Cell V:
666.16 ų (Calculated from Unit Cell)
Comment:
Cell data for synthetic material (Weil, 2021).
Relationship of Unnamed (OH-analogue of Mimetite) to other Species
Member of:
Other Members of Apatite Group:
| Alforsite | Ba5(PO4)3Cl | Hex. 6/m : P63/m |
| 'Apatite' | Ca5(PO4)3A | |
| Chlorapatite | Ca5(PO4)3Cl | Hex. 6/m : P63/m |
| Fluoralforsite | Ba5(PO4)3F | Hex. 6/m : P6/m |
| Fluorapatite | Ca5(PO4)3F | Hex. 6/m : P63/m |
| Fluorpyromorphite | Pb5(PO4)3F | Hex. 6/m : P63/m |
| Hydroxylapatite | Ca5(PO4)3(OH) | Hex. 6/m : P63/m |
| Hydroxylpyromorphite | Pb5(PO4)3(OH) | Hex. 6/mmm(6/m2/m2/m) : P63/mcm |
| Johnbaumite | Ca5(AsO4)3(OH) | Hex. 6/m : P63/m |
| Mimetite | Pb5(AsO4)3Cl | Hex. 6/m : P63/m |
| 'Oxypyromorphite' | Pb10(PO4)6O | |
| Pieczkaite | Mn5(PO4)3Cl | Hex. 6/m : P63/m |
| Pliniusite | Ca5(VO4)3F | Hex. 6/m : P63/m |
| Pyromorphite | Pb5(PO4)3Cl | Hex. 6/m : P63/m |
| Stronadelphite | Sr5(PO4)3F | Hex. 6/m : P63/m |
| Svabite | Ca5(AsO4)3F | Hex. 6/mmm(6/m2/m2/m) : P63/mmc |
| Turneaureite | Ca5(AsO4)3Cl | Hex. 6/m : P63/m |
| Vanadinite | Pb5(VO4)3Cl | Hex. 6/m : P63/m |
Common Associates
Associations Based on Photo Data:
| 2 photos of Unnamed (OH-analogue of Mimetite) associated with Oxyplumboroméite | Pb2Sb2O6O |
| 2 photos of Unnamed (OH-analogue of Mimetite) associated with Quartz | SiO2 |
Related Minerals - Strunz-mindat Grouping
| 8.BN. | Fluoralforsite | Ba5(PO4)3F |
| 8.BN. | Aradite | BaCa6[(SiO4)(VO4)](VO4)2F |
| 8.BN. | Magganasite | CuFe3+3O(AsO4)3 |
| 8.BN. | Fluorpyromorphite | Pb5(PO4)3F |
| 8.BN. | Fluorsigaiite | Ca2Sr3(PO4)3F |
| 8.BN.05 | Pieczkaite | Mn5(PO4)3Cl |
| 8.BN.05 | Fluorapatite | Ca5(PO4)3F |
| 8.BN.05 | Fluorcaphite | SrCaCa3(PO4)3F |
| 8.BN.05 | Vanadinite | Pb5(VO4)3Cl |
| 8.BN.05 | Hedyphane | Ca2Pb3(AsO4)3Cl |
| 8.BN.05 | Hydroxylhedyphane | Ca2Pb3(AsO4)3(OH) |
| 8.BN.05 | 'Mimetite-M' | Pb5(AsO4)3Cl |
| 8.BN.05 | Johnbaumite | Ca5(AsO4)3(OH) |
| 8.BN.05 | Pliniusite | Ca5(VO4)3F |
| 8.BN.05 | 'Hydroxylapatite-M' | Ca5(PO4)3OH |
| 8.BN.05 | Hydroxylpyromorphite | Pb5(PO4)3(OH) |
| 8.BN.05 | Miyahisaite | (Sr,Ca)2Ba3(PO4)3F |
| 8.BN.05 | Carlgieseckeite-(Nd) | NaNdCa3(PO4)3F |
| 8.BN.05 | Belovite-(Ce) | NaCeSr3(PO4)3F |
| 8.BN.05 | Kuannersuite-(Ce) | NaCeBa3(PO4)3F0.5Cl0.5 |
| 8.BN.05 | Alforsite | Ba5(PO4)3Cl |
| 8.BN.05 | Stronadelphite | Sr5(PO4)3F |
| 8.BN.05 | Parafiniukite | Ca2Mn3(PO4)3Cl |
| 8.BN.05 | Mimetite | Pb5(AsO4)3Cl |
| 8.BN.05 va | 'Germanate-pyromorphite' | Pb5(PO4)2GeO4 |
| 8.BN.05 | Belovite-(La) | NaLaSr3(PO4)3F |
| 8.BN.05 | Fluorphosphohedyphane | Ca2Pb3(PO4)3F |
| 8.BN.05 | Fluorstrophite | SrCaSr3(PO4)3F |
| 8.BN.05 | Hydroxylapatite | Ca5(PO4)3(OH) |
| 8.BN.05 | 'Johnbaumite-M' | Ca5(AsO4)3OH |
| 8.BN.05 | Phosphohedyphane | Ca2Pb3(PO4)3Cl |
| 8.BN.05 | Turneaureite | Ca5(AsO4)3Cl |
| 8.BN.05 | Morelandite | Ca2Ba3(AsO4)3Cl |
| 8.BN.05 | 'Oxypyromorphite' | Pb10(PO4)6O |
| 8.BN.05 | Deloneite | (Na0.5REE0.25Ca0.25)(Ca0.75REE0.25)Sr1.5(CaNa0.25REE0.25)(PO4)3F0.5(OH)0.5 |
| 8.BN.05 | Chlorapatite | Ca5(PO4)3Cl |
| 8.BN.05 | Pyromorphite | Pb5(PO4)3Cl |
| 8.BN.05 | Vanackerite | Pb4Cd(AsO4)3Cl |
| 8.BN.05 | Svabite | Ca5(AsO4)3F |
| 8.BN.10 | Arctite | Na2Ca4(PO4)3F |
| 8.BN.10 | Krügerite | BaCa6(SiO4)2[(P0.5S0.5)O4]2F |
| 8.BN.15 | Goryainovite | Ca2(PO4)Cl |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Unnamed (OH-analogue of Mimetite)
mindat.org URL:
Steirische Kalkspitze, Giglach lakes, Giglach valley, Schladming, Liezen District, Styria, Austria