• Webster's Revised Unabridged Dictionary
    • n Herderite (Min) A rare fluophosphate of glucina, in small white crystals.
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Century Dictionary and Cyclopedia
    • n herderite A rare fluophosphate of beryllium and calcium, occurring in white or yellowish transparent crystals in Saxony, and at Stoneham in Maine, U. S.
    • n herderite It occurs also at Paris and Hebron, Maine. It is shown by Penfield to be monoclinic (pseudo-orthorhomnic) in crystallization, with a composition expressed by the formula Ca [Be (F, OH)] PO4. Purefluor-herderite has not yet been observed; the mineral from Paris is a hydrofluor-herderite, and that from Hebron a hydroherderite.
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Webster's Revised Unabridged Dictionary
Named after Baron von Herder, who discovered it