Radium DecayRadium decay is the process of generating Radon through Proof of Network Contribution. Radium decay is rate limited, meaning each user can only generate Radon at a set range of speeds. The slowest speed of Radon generation is 3 Radon per hour, at a cost of 1 Radium per Radon. The fastest rate of Radon generation is 30 Radon per hour, at a cost of 2.8 Radium per Radon. The Radium that is contributed to the network becomes incorporated in the next block's stake reward.
I've also some other mined coins but they're 'Genated but not accepted Mined', what does this mean? Here's an overview: