It was one of the biggest stories on a busy day in the world of small caps.
The AIM-listed explorer has the chance to earn up to 51% of the new joint-venture company, while Rio has agreed that it or one of its subsidiaries will buy the output from any mine.
It the follows “positive results” from studies that found that ReNeuron generated exosomes were potentially an effective delivery system for Benitec's gene silencing technology.
Mporium has completed its share swap with Cxense subject only to the admission of 25mln new ordinary shares on AIM.
CEO Barry Moat said: "This partnership with Cxense is important to our business strategy of making merchants more successful in all aspects of their m-commerce opportunity.
“We are delighted to have formed this strategic alliance and expect it to be hugely beneficial to Mporium going forward."
Elsewhere, Lansdowne Oil & Gas (LON:LOGP) said Petronas unit Kinsale Energy has now contracted the Ocean Guardian drilling rig to drill a well on the Midleton Prospect in the Celtic Sea which it has a 20% stake in.
Meanwhile, Gemfields (LON:GEM) has held another successful ruby auction in Singapore that included the sale of a recently discovered pair of rare matching red stones.
Cost saving measures to offset lower copper prices returned Rambler Metal & Minerals (LON:RMM) to profit in its latest quarter.
A new mine plan at its Ming operation in Newfoundland also improved its performance and the miner reported a net profit of C$1.32mln in the three months to April.
The company hailed a six-month period (to the end of March 2015) of continued strong progress in its drug discovery programmes.
Finally, Low-cost airline fastjet (LON:FJET) has offloaded its loss-making Fly 540 Ghana business.
The business was acquired from Lonrho Aviation in July 2012 but has been in mothballs since May 2014, pending a sale or restructuring. It made a loss before tax of US$11.3mln in 2014.