I was involved in this RG discussion and came up with this scenario:
https://www.researchgate.net/post/Why_wustite_FeO_and_nitride_FeN_have_same_picks_in_GI_XRD?view=5a6ea20e5b4952dd7a765a23
One of the expert contributors, Ian Slipper (RIP) passes away and all his valuable posts and contributions are removed from RG:
Why? Whose decision was it? Family or RG or Member?
Please share your knowledge about this important aspect of RG. I'll add the appropriate topics as I figure it out :-)
Thanks a million in advance for your diligence!