"Uranus and Neptune: Cloudy with a chance of diamonds" and more...
Uranus and Neptune: Cloudy with a chance of diamonds : Researchers at SLAC National Accelerator Laboratory have recreated the ice giants’ diamond rain. (Alison KLESMAN, Astronomy Magazine ; August 23, 2017) Scientists Create "Diamond Rain" that Forms the Interior of Icy Giant Planets (Press Release, SLAC National Accelerator Laboratory - Stanford University ; August 21, 2017) https://www6.slac.stanford.edu/news/2017-08-21-scientists-create-diamond-rain-forms-interior-icy-giant-planets.aspx More on Neptune and Uranus... Carbon precipitation from heavy hydrocarbon fluid in deep planetary interiors (LOBANOV et al. , 2013) https://www.nature.com/articles/ncomms3446.pdf Chemical Processes in the deep interior of Uranus (CHAU et al ., 2011) https://www.researchgate.net/profile/W_Nellis/publication/49857484_Chemical_processes_in_the_deep_interior_of_Uranus/links/55a1d7e608aec9ca1e63e3e8.pdf