Ice Crystal Matrix measurements of H2O molecules? I want a mathematically generated 3D STL copy of this image, however it's represent algorithmically.

If I do all the H2O's as individual pieces with female connections prepared for chopped bike spokes, are all the H2O's the same and what angles do they have?

Is there a written array of positions and degrees of rotation of the water molecules of a regular ice matrix?
You can produce STL (and VRML) files directly from Mercury - see https://www.ccdc.cam.ac.uk/Community/blog/post-56/

I'm not sure how best you'd go about including female sockets for bike spoke segments, but be aware that for some 3D printing types you're charged for the total volume of material used, so you might be better off trying to create a model with multiple molecules in a smaller area with less empty space.