Two different symbols representinɡ a phoneme

Question

How would I represent multiple transliterations for one phoneme in a chart?

I was thinking something like this: ⟨k~q⟩ /k/

It might work, though it doesn't make the most sense, and I would prefer to use the more common method [if there is one.]

Answer 1

I would use a comma: ⟨k⟩, ⟨q⟩.

The tilde is a reasonable option, since it means "alternates with depending on context" (i.e. /k~q/ is a phoneme where [k] alternates with [q]), but I also associate it very strongly with phonology; when first seeing ⟨k~q⟩ /k/ I mentally transposed the brackets and thought the glyph ⟨k⟩ meant the phoneme /k~q/.