Cobalt olivine

Cobalt silicate blue olivine, formula and DCMA number, 7 347t CobaltCII) stearate, uses, 7 240t CobaltCII) succinate trihydrate, uses, 7 240t... 

Morioka M. (1980). Cation diffusion in olivine, I Cobalt and magnesium. Geochim. Cosmochim. Acta., 44 759-762. 

The X-ray structure refinement of a synthetic Mg-Co2+ olivine (Ghose and Wan, 1974 Ghose et al., 1975) show that Co2+ ions also favour the Ml sites. The Xddata plotted in fig. 6.3 indicate that cobalt is less strongly enriched than Ni2+ ions in the Ml sites. The X-ray structure refinements (Ghose et al., 1975) and Kd data plotted in fig. 6.3 show that Zn2+ ions also favour the olivine Ml sites. 

Olivine is a major reservoir for divalent transition metal cations in xenoliths. Nickel, manganese, cobalt, and zinc all show correlations with Fo content in olivine from xenoliths. Nickel is positively correlated with Fo content, whereas cobalt, manganese, and zinc are negatively correlated suggesting the latter behave moderately incompatibly during the melting... 

Orthopyroxene partitions nickel, cobalt, and manganese less than olivine and there are no clear correlations amongst these elements. Although low in abundance, orthopyroxene can be a significant reservoir for the trivalent cations vanadium, scandium plus tetravalent titanium, due to its high modal abundance, especially in depleted xenoliths with little or... 

Close similarity to the olivine structure is revealed by an X-ray study on Co7oAs36Oi6, one of the compounds formed in the CoO-As2Os system.683 The oxygen atoms are in hexagonal close packing, with the cobalt and arsenic occupying respectively the octahedral and tetrahedral sites. Complete occupancy of each site would lead to the composition Co8As4Oi6. 

The superchondritic Mg/Si ratio of Earth s upper mantle might arise from olivine flotation in an early magma ocean (Agee and Walker, 1988). Such an explanation would have to be consistent with other minor and trace elements, especially those known to be compatible in olivine at low pressure such as nickel, cobalt, and manganese. Olivine is a stable liquidus phase in chondritic and peridotitic compositions to 15 GPa (Agee et aL, 1995 Zhang and Herzberg,... 

Ehlers K., Grove T. L., Sisson T. W., Recca S. L., and Zervas D. A. (1992) The effect of oxygen fugacity on the partitioning of nickel and cobalt between olivine, silicate melt, and metal. Geochim. Cosmochim. Acta 56,3733 3743. 

Lithium cobalt phosphate, LiCoP04 (LCP) has attracted attention since it offers both flat high potential (at approximately 4.8 V vs. Li /Li" ), good theoretical capacity (167 mAg ) and smaller structure volume change. As other olivine compounds, LCP crystallizes with the orthorhombic symmetry (Pnma S.G.) with lattice parameters a = 10.2048 A,b = 5.9245 A, and c = 4.7030 A. However, like in the case of LiMnP04, the electrochemical performance of pristine LCP is very poor due to the low intrinsic electronic and ionic conductivity [67, 102-116]. Zhao et al. [116] prepared LCP micro-rods with the diameter of ca. 500 nm and length of ca. 5 pm by a hydrothermal method, which delivered a discharge capacity of only... 

Koleva V, Zhecheva E, Stoyanova R (2010) Oidtaed olivine-type lithium-cobalt and lithium-nickel phosphates prepared by a new precursor method. Eur J friorg Chem 26 4091—4099... 

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