I think it's a misnomer to say the mind is material.

From my limited understanding of the brain, my concept of the mind is this:

  - The brain is a computer and the computer is material
  - The brain executes software, and the software is grown/encoded as neural networks
  - The state of the running instance(s) of the software is the current action potential of every neuron
  - Both the software and the state encode information 
  - The information can represent things that are real, unreal, consistent, inconsistent, etc.
  - The information is abstract and immaterial, but stored in a physical and dynamic system
  - The flow of information is tolerant of faults and noise in the underlying physical neural network. A failure of a small percentage of connections does not prevent the information from flowing through the system
  - The information is not dependent on the precise physical network, but rather on the virtual network composed of many redundant connections

Therefore, I think the mind is:

  - information
  - encoded in a virtual network
  - built on many redundant physical neural connections
  - produced and supported by the brain