Looking for a novel that I read in the eighties (I think, or maybe the late 70s), about humans colonising Venus.
Much of the book is about the communication problems between the humans and the Venusians they meet, who don't think in terms of days, because they don't have any. All human concepts are based on our lives being divided into distinct days, and theirs weren't.
I don't remember much else, except that the humans couldn't visit every part of the planet, because in some areas, their clothes slowly disintegrated, even spacesuits, and they couldn't find out why.
Hope this is enough. I don't have anything else!