Also found in: Encyclopedia, Wikipedia.
Related to Herderite: Danburite, heulandite, Hutterites


n.1.(Min.) A rare fluophosphate of glucina, in small white crystals.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Violet and blue herderite crystals, as well as many other pegmatite species, are also well known from this place.
We have learned over the years to refer to these familiar items, and indeed to refer to nearly all other "herderite" specimens, as hydroxylherderite: after all, the 2008 edition of Fleischer's Glossary of Mineral Species calls "herderite," with F exceeding OH, a "doubtful species." However, thanks to the industry of Luis Menezes, we may have to revise our thinking.
Ken turned again to prospecting in 1996, and for the next few years he traveled from prospect to prospect, finding herderite in Cooper Canyon in Riverside County; Japan-law quartz twins near Patagonia, Arizona; amethyst in the Kingston Mountains, California; and quartz scepters on Peterson Mountain, Nevada.
It crystallizes in the monoclinic system and is isostructural with herderite. While the standard mineralogical references indicate that datolite does not form twinned crystals, twinning is very commonly observed in herderite crystals.
They're all here, in multiple samples ranging in quality from "study grade" to absolutely superb: Freiberg acanthite and stephanite, Schneeberg proustite and erythrite and roselite and uranium-bearing species, Andreasberg pyrargyrite and dyscrasite and fluorite and pink apophyllite, Siegerland malachite and anglesite and millerite and galena, Schwarzwald fluorite and barite and silver, Obermoschel cinnabar and moschellandsbergite, Ems pyromorphite and cerussite, Johanngeorgenstadt mimetite, Ohrenstock hausmannite, Fichtelgebirge topaz and microcline and herderite, Ehrenfriedersdorf cassiterite and fluorapatite, Ilfeld manganite, Ronneburg whewellite, Hagendorf phosphates ...