Summary: Natural cobalt hydroxide is CoO.OH, not Co(OH)2 as has recently been asserted; for this mineral the name heterogenite has priority. Copper, frequently present, may be in solid solution as (Co,Cu)(O,OH)OH, or may be as finely divided malachite; for cuprian heterogenite, the name schulzenite has priority.
Mineralogical Magazine; September 1962 v. 33; no. 258; p. 253-259; DOI: 10.1180/minmag.1962.033.258.08
© 1962, The Mineralogical Society
Mineralogical Society (www.minersoc.org)