Samuel Pickworth Woodward Posnjakite Layered double hydroxides Creedite List of minerals recognized by the International Mineralogical Association (H) Sulfate mineral List of minerals recognized by the International Mineralogical Association (W–X) List of minerals recognized by the International Mineralogical Association (Y–Z) List of minerals recognized by the International Mineralogical Association (N) List of minerals (synonyms) List of minerals recognized by the International Mineralogical Association (M) Collection of fossils in the National Museum of Brazil List of mineral symbols