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An orange-red to grayish yellow mixture of several uranium oxides, silicates, and salts occurring naturally in the oxidation and hydration of uraninite.

[German Gummit, from Gummi, gum, from Middle High German, from Medieval Latin, from Latin; see gum1.]


(Minerals) an orange or yellowish amorphous secondary mineral consisting of hydrated uranium oxides
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Noun1.gummite - a gummy orange mixture of uranium oxides and silicates occurring naturally in the hydration and oxidation of pitchblende
mixture - (chemistry) a substance consisting of two or more substances mixed together (not in fixed proportions and not with chemical bonding)
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References in periodicals archive ?
A feature display of rich uranium ores from Grafton, New Hampshire shows uraninite and gummite in strongly contrasting specimens.
Nonoxidized (primary) ones consisted mainly of nasturan (80-90%) with black, gummite and uranium mica.
Comblainite is found in millimeter-thick beds of turquoise-blue masses, and also yellow to yellowish green masses in association with gummite.