Paulkerrite Group
A group of related mineral species
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About Paulkerrite Group
Formula:
A2M12M22M3(PO4)4X2(H2O)10 · 4H2O
A = K, H2O;
M = Mg, Mn2+, Al, Fe3+, Ti;
X = O, OH, F
M = Mg, Mn2+, Al, Fe3+, Ti;
X = O, OH, F
The orthorhombic unit cells for hochleitnerite and pleysteinite were obtained from laboratory diffractometer studies on single crystals (SCs). Recent SC studies using a synchrotron microfocus beam confirm that the unit cells for these minerals have a small monoclinic distortion, as occurs in the minerals rewitzerite and paulkerrite. It is likely that all paulkerrrite-group minerals with 1 atom of K per formula unit are monoclinic.
Unique Identifiers
Mindat ID:
470826
Long-form identifier:
mindat:1:1:470826:7
GUID
(UUID V4):
(UUID V4):
a11673b2-4bdd-4d51-a969-e220633f582d
IMA Classification of Paulkerrite Group
IMA status notes:
IMA Approved Group Name
Approval history:
Proposal 22-K-bis
Chemistry of Paulkerrite Group
Mindat Formula:
A2M12M22M3(PO4)4X2(H2O)10 · 4H2O
A = K, H2O;
M = Mg, Mn2+, Al, Fe3+, Ti;
X = O, OH, F
A = K, H2O;
M = Mg, Mn2+, Al, Fe3+, Ti;
X = O, OH, F
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0011061 | Benyacarite | Demartin F, Pilati T, Gay H D, Gramaccioli C M (1993) The crystal structure of a mineral related to paulkerrite Zeitschrift fur Kristallographie 208 57-71 |  | 1993 | granitic pegmatites in Cerro Blanco, Tanti, Cordoba, Argentina | 0 | 293 |
CIF Raw Data - click here to close
Relationship of Paulkerrite Group to other Species
Group Members:
| Benyacarite | (H2O)2Mn2Ti2Fe3+(PO4)4(OF)(H2O)10 · 4H2O | Orth. mmm (2/m 2/m 2/m) : Pbca |
| Hochleitnerite | Mn2Ti3(PO4)4O2(H2O)2 · 14H2O | Orth. mmm (2/m 2/m 2/m) : Pbca |
| Hydroxylbenyacarite | (H2O)2Mn2(Ti2Fe)(PO4)4[O(OH)](H2O)10 · 4H2O | Orth. mmm (2/m 2/m 2/m) : Pbca |
| Macraeite | K(H2O)Mn2(Fe2Ti)(PO4)4[O(OH)](H2O)10 · 4H2O | Mon. 2/m : P21/b |
| Mantienneite | KMg2Al2Ti(PO4)4(OH)3 · 15H2O | Orth. mmm (2/m 2/m 2/m) : Pbca |
| Paulkerrite | K(Mg,Mn2+)2(Fe3+,Al,Ti,Mg)2Ti(PO4)4(OH)3 · 15H2O | Mon. m |
| Pleysteinite | [(H2O)0.5K0.5]2Mn2Al3(PO4)4F2 · 14H2O | Orth. mmm (2/m 2/m 2/m) : Pbca |
| Rewitzerite | [K(H2O)]Mn2Al3(PO4)4(OH)2 · 14H2O | Mon. 2/m : P21/b |
| Sperlingite | (H2O)K(Mn2+Fe3+)(Al2Ti)(PO4)4[O(OH)] [(H2O)9(OH)] · 4H2O | Mon. 2/m : P21/b |
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 Paulkerrite Group
mindat.org URL:
https://www.mindat.org/min-470826.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
Hagendorf South Pegmatite, Hagendorf, Waidhaus, Neustadt an der Waldnaab District, Upper Palatinate, Bavaria, Germany