Use of 'PHYSICAL PROPERTIES' properties in expressions?

[__archiben]

Hi,

I am looking for a way to use parameters from the hard-coded 'PHYSICAL PROPERTIES' (see screenshot) properties in other Property expressions. i.e.

(Volume_(NET) / Density) * Embodied_Carbon

Those properties are not shown as available in the  Parameters & Properties expression editor, but I thought I might just be able to type it and AC would pick them up: no dice. I know that I am dancing along the edge of AC's OOTB capabilities and API/add-ons, but would this be hard to implement? Anyone know a way?

~/BF