出典:Wiktionary
出典:『Wiktionary』 (2025/04/20 19:06 UTC 版)
Maynard Bixby, American mineralogist, + -ite.
bixbyite (countable and uncountable, plural bixbyites)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/14 12:15 UTC 版)
Bixbyite is a manganese iron oxide mineral with formula: (Mn,Fe)2O3. The iron:manganese ratio is quite variable and many specimens have almost no iron. It is a metallic dark black with a Mohs hardness of 6.0 - 6.5. It is a somewhat rare mineral sought after by collectors as it typically forms euhedral isometric crystals exhibiting various cubes, octahedrons, and dodecahedrons.