Figure 3: Core from hole DD1571 at a depth of 211.8 metres, showing almost all cuprite
, Cu[sub.2]O, is 88.82% copper by weight).
It was seen that for copper surface exposed to biodiesel, copper oxide of red black color is the main compound appeared while on diesel exposed surface cuprite
oxide of red color is appeared.
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.
1: balance line of Cu; 2: balance line of Fe; 3: balance line of S; 4: balance line between sulfide and oxide; 5: number of chemical equations in Table 4; Py: pyrite; Cp: chalcopyrite; Bn: bornite; Cc: chalcocite; Hm: hematite; Mag: magnetite; Cr: cuprite
; and Tn: tenorite.
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
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.