My understanding is that L-Max doesn't process Petalite, as it's...

My understanding is that L-Max doesn't process Petalite, as it's a lithium silicate like Spodumene. Both will likely drop out of solution during processing.

Extract from agreement with Pioneer Resources:

"Other minerals: Lepidico will retain rights to minerals conducive to treatment by the L-Max® process, including lepidolite and other Li-bearing mica minerals as well as lithium phosphate minerals such as amblygonite and montebrasite. Any other lithium silicate minerals such as spodumene and petalite would be handed to Pioneer. All other products would be shared on a pro-rata basis, other than pollucite mineralisation, which is explicitly reserved by Pioneer for its sole benefit."

However, think of the advantages of that to a Spodumene miner/refiner... you've 'cleaned' their spodumene for them of any micas.