'Laubmannite (of Moore)' (not an IMA approved species)
Formula:
(Fe3+,Fe2+,M)8+x(OH,H2O)9(H2O)2(PO4)5, M = Fe3+, Cu2+ or other metal cation, x ~ 0.1.
Comments:
The material originally reported as "Laubmannite" showed to consist of an intimate mixture of finely fibrous dufrenite and kidwellite which give an x-ray diffractometer pattern easily confused with laubmannite (Barwood & Hajek 1978)
Indian Mountain, Cherokee County, Alabama, USA