allactite

allactite

[ə′lak‚tīt]
(mineralogy)
Mn7(AsO4)2(OH)8 A brownish-red mineral consisting of a basic manganese arsenate.
References in periodicals archive ?
1954 Synadelphite and Allactite, Nordmark, Sweden, no.
Hydrocerussite and rare allactite have also been noted in this assemblage.
The magnesium- and phosphate-dominant analogue of allactite
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).