Detailed structure calculations in Ξ~(12)Be, Xi~7H and Ξ~(10)Li are performed within the framework of the microscopic of four-body cluster models. We adopted effective ΞN interactions derived from the Nijmegen interaction models, which give rise to substantially attractive Ξ-nucleus potentials in accordance with the experimental indications. Ξ~7H andΞ~(10)≤ are predicted to have bound states. We propose to observe the bound states in future (K~-,K~+) experiments using ~7Li and ~(10)B targets in addition to the standard ~(12)C target. The experimental confirmation of these states will provide information on the spin- and isospin-averaged ΞN interaction.
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