Cafetite

Pale yellow Cafetite in radial aggregates from Rasvumchorr, Khibiny. Note similarity to Kassite from Eweslogchorr! Both minerals
occur pale yellow in Natrolite veins of the southeast Khibiny massif. In fact Kassite is altered to Cafetite and this might be a mixture of the two.
[photo Maurice de Graaf, collection Diederik Visser]

Note the resemblance of Kassite and Cafetite. Please consult the following  reference for a detailed description of the differences:
Grey et al, 2003 The crystal structure of chromian kassite from the Saranovskoye deposit, Northern Urals: American Minerlogist Vol 88, 1331-1335