When a star collapses in on itself, and becomes a neutron star, it takes a lot of gravity. However, if 2 neutron stars collided at very high speeds (too high to merge together) they would fragment. <br /><br />The outer shell is composed primarily of iron nuclei. Inside, it is a liquid composed primarily of neutrons, with the composition of neutrons increasing as you get closer to the center. If the center was successfully fragmented, then superdense pieces of clumped up neutrons would fly into space. <br /><br />Because these pieces from the center would be pure superdense neutrons, would the fragments stay together in a superdense form, even with superficial gravity? After all, the neutrons will not repel one another, such as protons or electrons would.<br /><br />Basically, would the pure-neutron fragments stay in superdense form after fragmentation? And what would the minimum fragment size be?