Here is my collection of Geodesic Domes. I wrote a computer program to do the math generate the design and then MineCraftStructurePlanner and MCedit to import them into Minecraft. Each schematic is named by its diameter, height and the frequency of the facets. The domes are symmetric and I only saved half of the dome so you will have to import them twice, mirror the second half and line up the block in the center. You can also make complete spheres (the bottom should be rotated 180 from the top). The 240x60 and 240x120 domes were made with an older version of the program, the rest are re-made with cleaner lines and glass.