| NOUN | process | powder technique, powder photography, powder method | a process for identifying minerals or crystals |
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| Meaning | 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. | |
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| Synonyms | powder photography, powder method | |
| Broader | photography | The process of producing images of objects on photosensitive surfaces |
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