Do we know If we are able mining through the wallet with XEON Phi co-processor
You can mine with any CPU but it's not worth it now because of GPU mining.
The XEON Phi is 72 core processor but they would not show up beside your CPU for the Pascalcoin wallet. While it would be amazing to see how fast it could hash blocks, I don't think it is compatible with the software.
these 72 core cpu's are like gpu's in design, utilizing pci express slots...maybe when time comes CPU mining won't die/phased out easily and we will have nvidia, amd, and cpu miners competing for hash... one problem, it seems pretty expensive, don't know price per hash ratio of these CPU cards though.