1) Oxide mineral
Found on
https://www.crosswordclues.com/clue/plattnerite
Plattnerite is an oxide mineral and is the beta crystalline form of lead dioxide (β-PbO2), scrutinyite being the other, alpha form. It was first reported in 1845 and named after German mineralogist Karl Friedrich Plattner. Plattnerite forms bundles of dark needle-like crystals on various minerals; the crystals are hard and brittle and have tetrag...
Found on
http://en.wikipedia.org/wiki/Plattnerite
Plattnerite is a black and heavy secondary mineral of the rutile group formed through the alteration of primary lead-bearing minerals and the oxidation of lead itself. Plattnerite was confirmed as a distinct species in 1845 and named after K F Plattner, professor of metallurgy and assaying at the University of Freiburg,Germany. Plattnerite is a lea...
Found on
http://www.probertencyclopaedia.com/browse/HP.HTM
Lead(IV) oxide
Found on
http://www.translationdirectory.com/glossaries/glossary075.htm
No exact match found.
