An actinide borate phosphate was prepared via a high temperature solid-state reaction. This phase exhibits unprecedented complex inorganic nanotubular fragments with an external diameter of ∼2 × 2 nm. The nanotubular aggregates are based on borate tubes where the exterior of the tubes is decorated with UO2(PO4)3 moieties to form a complex shape with a cross-section similar to the clover cross.