Previous investigators have reported five mineral species from the Tsumeb mine with essential antimony: famatinite, stibnite, stibiconite and nadorite
(Schneider, 1992), and biehlite (Schluter et al., 2000).
Watch for more showy hematite specimens from this locality, and try not to confuse the place with Djebel Nador, Algeria (the type locality for nadorite
, by the way).
Relationship to other species: It is a Pb-sheet mineral similar to nadorite
, PbSb[O.sub.2]Cl, mereheadite, [Pb.sub.2]O(OH)Cl, and thorikosite, ([Pb.sub.3][Sb.sub.0.6][As.sub.0.4])[O.sub.2](OH)[C1.sub.2].
Philolithite is mineralogically and genetically related to the lead oxychloride "family," which at Langban presently comprises blixite, ekdemite, freedite, heliophyllite, mendipite, nadorite
, petite, sahlinite, and sundiusite.