So if SYA build the carbonate plant themselves and in 3 years...

So if SYA build the carbonate plant themselves and in 3 years time the market price for SC6 is around $900 what will PLL do buy the SC6 for $900 from SYA and sell it for $900, they could put it through there own plant I guess if they have one and they don't have enough feed for it.

SYA could could say look do you want to give us $900 per tonne or we can process it through our Plant and you get 25% of the profits on the carbonate. That's how i see this working out, eventually SC6 will come down in price to the point where the carbonate plant makes more sense and more profit to both partners.

unless of course you think SC6 will command $5000+ for ever which i think is unlikely because alternatives will be found more supply will come on line etc.