1) Iron mineral 2) Monoclinic mineral
Found on
https://www.crosswordclues.com/clue/hedenbergite
Hedenbergite, CaFeSi2O6, is the iron rich end member of the pyroxene group having a monoclinic crystal system. The mineral is extremely rarely found as a pure substance, and usually has to be synthesized in a lab. It was named in 1819 after M.A. Ludwig Hedenberg, who was the first to define hedenbergite as a mineral. Contact metamorphic rocks high...
Found on
http://en.wikipedia.org/wiki/Hedenbergite
silicate mineral, calcium iron silicate of the pyroxene group closely analogous to diopside (q.v.).[3 related articles]
Found on
http://www.britannica.com/eb/a-z/h/30
Hedenbergite is a green or black coloured rock-forming mineral found in contact metamorphic rocks such as skarn, and also in certain igneous rocks and ore bodies. Hedenbergite was named by the Swedish chemist Johan Berzelius after his colleague Ludvig Hedenberg. Hedenbergite is a pyroxene containing iron and calcium. Crystals are rare, but those wh...
Found on
http://www.probertencyclopaedia.com/browse/HH.HTM
No exact match found.
