1) Phosphate mineral 
Sinkankasite, mineral formula: {chem|H|2|MnAl(PO|4|)|2|(OH)·6H|2|O}, was named after John Sinkankas (1915–2002), noted author and mineral collector, Scripps Institute of Oceanography. It is triclinic; as colorless, bladed to prismatic crystals up to 4 mm in length, often as divergent, radial aggregates and as pseudomorphs after triphlyte crysta...