We investigated the composition, stability, and structures of clusters of G, A, and SA using mass spectrometry, vibrational spectroscopy, and quantum chemical calculations. Our the organic and inorganic constituents even at these small sizes. While only a few demonstrative clusters were sampled, our work provides experimental evidence that G could play a complex role in clusters of this type if present in the atmosphere. It would likely efficiently displace ammonia in new particles. Furthermore, these clusters have many close-lying isomers at relevant temperatures, highlighting potentially important entropic effects in models of particle growth at atmospherically relevant temperatures.