Talk:Phi

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Grain Size

Phi is a symbol used when describing grain size in sedimentology. Wentworth and Krumbian scales both use φ to describe the size of individual sediment particles.

This should be added to the list of scientific measurements that utilize phi.

See more here: https://en.wikipedia.org/wiki/Grain_size

alternate symbol

the first line "lowercase φ or ϕ" shows two identical symbols on my computer and it's not clear how they are distinguished. i'm not sure how you could guarantee that both different symbols are shown.