To my knowledge, there are no catalogued lists of viscosity for minerals. This is probably because such a thing could not exist. Viscosity of a mineral will depend on temperature, flow stress and strain rate. The best thing you can do is calculate the viscosity from strain rate and flow stress. For this you will need some estimate of flow stress. A grain size peizometer is usually the easiest way to get this but there arent many (quartz, calcite and olivine I think). Then use this value with a temperature estimate to calculate a strain rate from an experiamentally derived flow law. Then use strain rate and flow stress to calculate viscosity.
Take a look at Parsons et al (2016, Geosphere) for a worked example of this.
https://www.researchgate.net/publication/301738292_Mid-crustal_deformation_of_the_Annapurna-Dhaulagiri_Himalaya_central_Nepal_An_atypical_example_of_channel_flow_during_the_Himalayan_orogeny
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