Needle-like crystal up to several mm length in graphic granite veins. Single-xtl XRD gave lattice parameters of perrierite subgroup (U. Kolitsch): a = 1.373 nm, b = 0.564 nm, c = 1.181 nm, β = 113.9°. Many crystal are metamict. Composition by EPMA (D. Harries) is consistent with perrierite subgroup, material is Al- and Si-rich and possibly partially hydrated due to radiation damage. Might be an Al analogue of perrierite-(Ce), but better knowledge of crystal chemistry is needed.
