cuprite - ορισμός. Τι είναι το cuprite
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Τι (ποιος) είναι cuprite - ορισμός

OXIDE MINERAL
Red copper ore
  • Cuprite from Tsumeb Mine (size:2.3 x 2.1 x 1.2 cm

cuprite         
['kju:pr??t]
¦ noun a dark red or brownish-black mineral consisting of cuprous oxide.
Cuprite         
·noun The red oxide of copper; red copper; an important ore of copper, occurring massive and in isometric crystals.

Βικιπαίδεια

Cuprite

Cuprite is an oxide mineral composed of copper(I) oxide Cu2O, and is a minor ore of copper.

Its dark crystals with red internal reflections are in the isometric system hexoctahedral class, appearing as cubic, octahedral, or dodecahedral forms, or in combinations. Penetration twins frequently occur. In spite of its nice color, it is rarely used for jewelry because of its low Mohs hardness of 3.5 to 4. It has a relatively high specific gravity of 6.1, imperfect cleavage and is brittle to conchoidal fracture. The luster is sub-metallic to brilliant adamantine. The "chalcotrichite" (from Ancient Greek: χαλκός θρίξ τριχός, "plush copper ore") variety typically shows greatly elongated (parallel to [001]) capillary or needle like crystals forms.

It is a secondary mineral which forms in the oxidized zone of copper sulfide deposits. It frequently occurs in association with native copper, azurite, chrysocolla, malachite, tenorite and a variety of iron oxide minerals. It is known as ruby copper due to its distinctive red color.

Cuprite was first described by Wilhelm Karl Ritter von Haidinger in 1845 and the name derives from the Latin cuprum for its copper content.

Cuprite is found in the Ural Mountains, Altai Mountains, and Sardinia, and in more isolated locations in Cornwall, France, Arizona, Chile, Bolivia, and Namibia.