. "109675519"@en-us . . "112775109"@en-us . . . "powder photography"^^ . . . "0"^^ . "powder technique"@en-us . "0"^^ . "a process for identifying minerals or crystals; a small rod is coated with a powdered form of the substance and subjected to suitably modified X-rays; the pattern of diffracted rings is used for identification"@en-us . . . . "113539585"^^ . . "powder method"@en-us . . "powder photography"@en-us . "13539585-n"^^ .