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The wavefunction of the lithium positride (LiPs) ground state is calculated using an ab initio approach which uses a Gaussian basis with correlation factors. The energy of the LiPs ground state, , has a total energy more negative than the sum of the positronium and lithium ground states. The ground state is therefore stable against dissociation into with a binding energy of .
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Ryzhikh et al. (1998) studied this question.
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