akrochordite

akrochordite

[‚ak·rō′kȯr‚dit]
(mineralogy)
Mn4Mg(AsO4)2(OH)4·4H2O Mineral consisting of a hydrous basic manganese magnesium arsenate and occurring in reddish-brown rounded aggregates; hardness is 3 on Mohs scale, and specific gravity is 3.2.
References in periodicals archive ?
I worked my way through scores of exotic specimens which up till then were only names in mineralogy texts to me: perite, allactite, akrochordite, paulmooreite, molybdophyllite, and eveite (the manganese analog of adamite, whose naming once elicited much criticism for its flippancy).