The calcium and tungsten oxides may be replaced by 1-3 wt.% calcium tungstate.
Tungsten is found in the minerals wolframite (iron-manganese tungstate, FeWO4/MnWO4), scheelite (calcium tungstate, CaWO4), ferberite and hubnerite.
The particular standard developed employs calcium tungstate: lead as a scintillator and radio-active elements as tritium or carbon-14 thymidine as a means of exciting the scintillator.
Tungsten (W) never occurs free in nature and is found only in a few minerals as tungstate of calcium, iron or manganese.
Tungsten (W) never occurs free in nature and is found only in a few minerals as tungstate of calcium, iron or manganese.
Tungsten (W) never occurs free in nature and is found only in a few minerals as tungstate of calcium, iron or manganese.
Requêtes fréquentes français :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
Requêtes fréquentes anglais :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
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