Event marketing jako jedna z form innowacji marketingowych w instytucjach naukowych i badawczych

Olejniczak, Aneta

doi:10.5604/05096669.1077707

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“…In the crystal structure of vesuvianite, the five-coordinated Y1 site (Table 1 and Figure 6) can be occupied by Fe 3+ , Fe 2+ , Mn 3+ , Mn 2+ , Cu, Mg and Al [16,23,30,51,52,55,65]. In most cases, including previously studied vesuvianite from the Somma-Vesuvius volcanic complex, Fe 3+ dominates in the Y1 site [48].…”

Section: X-ray Crystallographymentioning

confidence: 99%

“…The 27 Al MAS NMR spectrum (Figure 3) of 27844 contains one broad peak, which is centered at −2.5 ppm and can be assigned to the octahedrally coordinated Al at the Y2 and Y3 sites [41][42][43][44][45][46][47][48][49][50][51][52]. Similarly to wiluite, broadening of the peak at 60 ppm can be assigned to a trace amount of Al in the 4-coordinated T1 site (<1 apfu) [29].…”

Section: Solid State Magic-angle Spinning Nuclear Magnetic Resonance mentioning

confidence: 99%

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Vesuvianite from the Somma-Vesuvius Complex: New Data and Revised Formula

et al. 2017

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At present, the vesuvianite group of minerals consists of eight members, six of which are distinguished by the dominant cation in the Y1(A,B) five-coordinated site. We investigated two vesuvianite samples from the type locality by electron microprobe analysis, Mössbauer and infrared spectroscopy, TGA/DSC, MAS NMR, single-crystal and powder X-ray diffraction. The crystal structures of these samples (# 27844 and 51062 from the Vesuvius collection, Fersman Mineralogical Museum, Moscow) have been refined to R 1 = 0.027 and R 1 = 0.035, respectively. Both samples have the space group P4/nnc; a = 15.5720(3) and 15.5459(3), c = 11.8158(5) and 11.7988(4), respectively. In both samples low-occupied T1 and T2 sites are populated by minor B and Al, which agrees with their high-temperature origin. According to our experimental results, the general revised crystal-chemical formula of vesuvianite can be written as VII

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