Australia's Calix rises on Rio Tinto deal

** Shares of Calix rise as much as 30.1% to A$0.605, hitting their highest level since July 31** Stock logs its biggest intraday pct gain since September 15** Environmental technology firm executes deal with mining giant Rio Tinto for over A$35 million ($22.86 million) of cash and in-kind support for demonstration of co's Zero Emissions Steel Technology (ZestyTM) in Kwinana, Western Australia** Stock down nearly 20% this year, including the day's move($1 = 1.5314 Australian dollars)