Trace element composition in tuite decomposed from natural apatite in high-pressure and high-temperature experiments

Zhai, Shuang Meng; Xue, Wei Hong; Ma, Fang

doi:10.1007/s11430-014-4980-7

Cited by 7 publications

(4 citation statements)

References 30 publications

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“…All these phenomena are in accordance with the presumed displacive phase transition. Although the experiments of Zhai et al [44] showed that apatite decomposed to tuite after 24 h heating at 15 GPa and 1800 K in a 1000-tons Kawai-type multi-anvil apparatus, the three strongest (110, 015 and 205) peaks of rhombohedral tuite [43] are not consistent with what were observed in our HPHT XRD patterns (Figure 3a). Therefore, the more complex diffraction patterns here indicate an unknown lower symmetry structure.…”

Section: Xrd Results Of Vanadinite At Hpht Conditionscontrasting

confidence: 88%

Phase Transitions in Natural Vanadinite at High Pressures

et al. 2021

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The structural stability of vanadinite, Pb5[VO4]3Cl, is reported by high-pressure experiments using synchrotron radiation X-ray diffraction (XRD) and Raman spectroscopy. XRD experiments were performed up to 44.6 GPa and 700 K using an externally-heated diamond anvil cell (EHDAC), and Raman spectroscopy measurements were performed up to 26.8 GPa at room temperature. XRD experiments revealed a reversible phase transition of vanadinite at 23 GPa and 600 K, which is accompanied by a discontinuous volume reduction and color change of the mineral from transparent to reddish during compression. The high-pressure Raman spectra of vanadinite show apparent changes between 18.0 and 22.8 GPa and finally become amorphous at 26.8 GPa, suggesting structural transitions of this mineral upon compression. The structural changes can be distinguished by the emergence of a new vibrational mode that can be attributed to the distortion of [VO4] and the larger distortion of the V–O bonds, respectively. The [VO4] internal modes in vanadinite give isothermal mode Grüneisen parameters varying from 0.149 to 0.286, yielding an average VO4 internal mode Grüneisen parameters of 0.202.

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Section: Xrd Results Of Vanadinite At Hpht Conditionscontrasting

confidence: 88%

Phase Transitions in Natural Vanadinite at High Pressures

et al. 2021

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“…We used an "enriched" depleted MORB source (E-DMM; Workman and Hart, 2005) for modeling. For high-Si melts, we first assumed a metasomatized mantle [a mixture of 0.5% K-hollandite (Rapp et al, 2008) and 99.5% E-DMM], and P-rich melt I [a mixture of 5% tuite melt (Zhai et al, 2014) and 95% of a 1% eclogite melt]. We used two approaches to determine high-Si melt compositions: (1) a 3% partial melt of a hybrid source [95% metasomatized mantle and 5% P-rich melt I] (Model 1), and (2) a mixture containing 90% of a 1% partial melt of metasomatized mantle and 10% P-rich melt I (Model 2).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Geochemistry of olivine-hosted melt inclusions in the Baekdusan (Changbaishan) basalts: Implications for recycling of oceanic crustal materials into the mantle source

Choi

Schiano

et al. 2017

Lithos

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“…Tuite formed by this process could be important for the trace element inventory of the mantle (Zhai et al 2014;Skelton and Walker 2017). However, the pressure at which apatite reacts to form tuite varies between studies, from as low as 7.5 GPa (Konzett and Frost 2009) to as high as 12 GPa (Murayama et al 1986).…”

Section: Introductionmentioning

confidence: 99%