Figure 3: Core from hole DD1571 at a depth of 211.8 metres, showing almost all
cuprite (
cuprite, Cu[sub.2]O, is 88.82% copper by weight).
In mineralogy, the colors in gemstones can be explained by their material makeup and the identity of the transition metal impurity in them." The various colors in
cuprite and malachite are explained by differences in oxidation states of copper ions in their crystal structures.
The copper can be correlated with the following three main components:
cuprite, azurite and malachite.
To illustrate the effectiveness of the proposed approach, the most widely used hyperspectral images in unmixing, such as
Cuprite, Urban, and Jasper Ridge, were selected in the spectral range from 380 nm to 2500 nm; each channel band width is up to 9.46 nm.
The XRD pattern of [Cu.sub.2]O NPs/zeolite A in Figure 3 showed that diffraction peaks appeared at 29.61[degrees], 36.48[degrees], 42.38[degrees], 61.46[degrees], 73.56[degrees], and 7752[degrees] corresponding to (110), (111), (200), (220), (311), and (222) planes of
cuprite, respectively, that indicated the formation of [Cu.sub.2]O nanocrystals (JCPDS Card number 05-0667) [4, 18].
on effect of vinegar in bronze vessels) or copper acetate, copper vitriol or copper sulphate and a mixture of black (copper (II) oxide or tenorite) and red (copper (I) oxide or
cuprite) copper oxides that forms in the burning of copper (see Hawthorne & Smith 1979, 121 f.).
It is composed mainly of galena (PbS), amorphous carbon, zincite (ZnO), sassolite ([H.sub.3]B[O.sub.3]), minium ([Pb.sub.3][O.sub.4]), magnetite ([Fe.sub.3][O.sub.4]), goethite (FeO(OH)),
cuprite ([Cu.sub.2]O), and talc ([Mg.sub.3][Si.sub.4][O.sub.10][(OH).sub.2]) [10-14].
05-0667) confirming the formation of a single cubic phase Cuprous ([Cu.sub.+1]) oxide ([Cu.sub.2]O) with
cuprite structure.
We simulate a virtual rover traversing the famous
Cuprite, Nevada, mining district, which is known for containing many distinctive spectral features of interest in highly localized outcrops (Swayze et al.