I can confirm that this is schoepite from Shinkolobwe. No doubt. The more lath-like crystals exist but are always pseudomorphs after rutherfordine, ianthinite or other. The MR volume 20 number 4 from 1989 page 285 shows a good example of the mineral as it occur at Shinkolobwe.
Schoepite occurs most often in tabular crystals flattened on 001; there is a yellow variety known as epi-ianthinite. The presentation of this variety is the same as the ianthinite but the chemical composition and properties are those of schoepite ( op cit M.Deliens in "Les minéraux secondaires d'uranium du Zaïre" ) See a nice description of schoepite in: http://www.agab.be/mineralogie/Katanga/katanga.html