metal itself—an atomic property independent of the chemical and physical state." (Mme. Curie) (see Radium).
Uranocircite: A
Phosphate of Barium and Uranium. Uranium Trioxide 56%. This mineral
occurs in yellow-green orthorhombic crystals similar to Autunite, in
quartz veins near Falkenstein. Saxony, and is interesting as a source
of uranium, from which Radium is extracted. (See Radium).
Uranophane: Hydrous
Silicate of Uranium and Calcium. Uranium Trioxide 67%. Occurs in minute
orthorhombic crystals, acicular prisms, and in radiated masses with
fibrous structure. Color honey-yellow or lemon-yellow. It is found in
granite in Silesia, and near Schneeberg, Saxony; also at the mica mines
in Mitchel County, North Carolina, as an alteration of Gum-mite. All
minerals containing uranium are interesting as a source of Radium.
Uranophilite: Uranium Trioxide 77.6%, Sulphur Trioxide 5.4%. It occurs as a velvety incrustation on Uraninite, at Joachimsthal, Bohemia. The crystals are minute,
flattened and acicular, yellow in color. (See Radium).
Uranospherite: Uranium
Trioxide 52.7%, Bismuth Trioxide 42.4%. Occurs in half-globular
aggregated forms made up of minute acutely-terminated crystals,
orange-yellow to brick-red in color, with other related uranium
minerals near Schneeberg, Saxony. (See Radium).
Uranospinite:
Probably an Arsenate of Uranium and Calcium, corresponding to Autunite.
Uranium Trioxide 57.2%, Arsenic Pentoxide 22.9%. Occurs in thin
tabular crystals, siskin-green in color, with uraninite and various
secondary uranium minerals near Schneeberg, Saxony. (See
Radium.)
Uranothallite: Uranium
Dioxide 36.8%, Carbon Dioxide 23.8%. Occurs in minute and indistinct
crystals united in scaly or granular aggregates, often incrusting.
Color siskin-green. It is found as an incrustation on Uraninite at
Joachimsthal, Bohemia.
Valentinite: Antimony Trioxide. Antimony 83.3%. Occurs in
crystals often aggregated in fan-shaped or stellar
groups; in bundles and druses and as aggregates of
thin plates; also massive. Color snow-white, peach-blossom red, and
ash-gray to brownish Named after Basil Valentine, an alchemist
