Nephrite Jade from Guangxi Province, China

Yin, Zheng; Jiang, Cui; Santosh, M.; Chen, Yiming; Bao, Yi; Chen, Quanli

doi:10.5741/gems.50.3.228

Cited by 20 publications

(10 citation statements)

References 2 publications

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“…The relevance of jade and its natural sources in the pre-and protohistory of East Asia justify the particular emphasis placed, since the nineteenth century (e.g. Damour 1846), on the petrographic and mineralogical characterization of 'jades', and in particular of Chinese 'jades' (e.g., West 1963;Wen and Jing 1992;Middleton and Freestone 1995;Sun et al 2002;Wang 2011;Zhang et al 2011;Yin et al 2014). However, with jade not being the focus of our research, we will use here 'jade' as a surrogate for any kind of stone hard enough to make ornaments, e.g.…”

Section: The Dispersal Of Bipolar Drilling Technique Into Mainland Somentioning

confidence: 99%

Shell Personal Ornaments Craft at the Site of Tha Kae, Lopburi Province, Central Thailand. Tracing the Southward Dispersal of the Drilling Technique

Ciarla

Rispoli²,

Yukongdi

2017

JIPA

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Section: The Dispersal Of Bipolar Drilling Technique Into Mainland Somentioning

confidence: 99%

Shell Personal Ornaments Craft at the Site of Tha Kae, Lopburi Province, Central Thailand. Tracing the Southward Dispersal of the Drilling Technique

Ciarla

Rispoli²,

Yukongdi

2017

JIPA

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“…For instance, rhomboidal complex M43 resulted in a fibrous morphology on the surface (Figure 7r), whereas hexagonal complexes M44 and M45 generated nanospheres under the same conditions (Figure 7s-t). 44 They also reported the successful construction of alkynylplatinum(II) bzimpy-functionalized hexagonal metallacycle M46 by coordinationdriven self-assembly of D29 (Figure 7u) and acceptors. M46 was able to hierarchically selfassemble into a stable supra-molecular metallogel (Figure 7v) at room temperature.…”

Section: Substituents Effect and Geometry Effects On The Higher-order Assembly Of Mocsmentioning

confidence: 97%

“…As shown by TEM, the M47 film displayed a sheetlike morphology (Figure 7x) rather than the linear fiber observed for M48 (Figure 7y). 44…”

Section: Substituents Effect and Geometry Effects On The Higher-order Assembly Of Mocsmentioning

confidence: 99%

Soft Materials with Diverse Suprastructures via the Self-Assembly of Metal–Organic Complexes

2019

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CONSPECTUS: Inspired by assemblies in the natural world, researchers have prepared diverse suprastructures with distinct spatial arrangements by artificial self-assembly, including micelles, vesicles, ribbons, films, fibers, and tubes. The field of assembly is undergoing a transition from single-component to multicomponent assembly and single-step to multistep processing. Control over the size, shape, and composition of these building blocks has enabled the formation of suprastructures with substantial structural diversity. More importantly, harnessing noncovalent interactions to create suprastructures in a controlled manner will lead to a better understanding of the formation of complex self-organized patterns. However, for the construction of multiscale self-assemblies with controllable shapes and functions, the selection of a suitable protocol remains challenging. Coordination-driven self-assembly provides a bottom-up approach to construct various metal-organic complexes (MOCs), which could be further used as building blocks with controllable shapes and sizes. Despite the tremendous progress made in the design of MOC-based supramolecular materials, most of these MOCs have dimensions of only several nanometers, and investigations of these structures rely on the characterization of their crystal structure. However, most of the functional suprastructures in living organisms have dimensions ranging from microns to centimeters and have the form of soft materials. Thus, obtaining MOC-based highly ordered materials of larger size remains a challenge. This Account focuses on our recent advances in the construction of soft suprastructure materials with MOCs. A series of functionalized MOCs were first constructed through coordination-driven self-assembly. Then, further self-assembly of the as-prepared MOCs gave rise to the formation of higher-order structures. By changing the functional groups in the acceptors and donors in the MOCs, different suprastructures, including nanospheres, nanodiamonds, nanorods, nanofibers, membranes, films, and gels, were prepared. These studies suggest that using MOCs as building blocks is a highly efficient strategy to achieve complex architectures and functional materials for the development of desired MOC-based soft materials with high precision and fidelity.

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“…Nephrite deposits are widespread around the world, but gem-quality ones are uncommon [15]. Major nephrite deposits are located in China [16][17][18][19][20][21][22][23][24], Russia [25,26], Canada [27], Australia [1], New Zealand [28][29][30], USA [1], and South Korea [31]. Nephrite can be divided into serpentinite-related (S-type) and dolomite-related (D-type) types according to its origin [1].…”

Section: Introductionmentioning

confidence: 99%

Mineralogy and Geochemistry of Nephrite Jade from Yinggelike Deposit, Altyn Tagh (Xinjiang, NW China)

Jiang

Shi

et al. 2020

Minerals

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The historic Yinggelike nephrite jade deposit in the Altyn Tagh Mountains (Xinjiang, NW China) is renowned for its gem-quality nephrite with its characteristic light-yellow to greenish-yellow hue. Despite the extraordinary gemological quality and commercial significance of the Yinggelike nephrite, little work has been done on this nephrite deposit, due to its geographic remoteness and inaccessibility. This contribution presents the first systematic mineralogical and geochemical studies on the Yinggelike nephrite deposit. Electron probe microanalysis, X-ray fluorescence (XRF) spectrometry, inductively coupled plasma mass spectrometry (ICP-MS) and isotope ratio mass spectrometry were used to measure the mineralogy, bulk-rock chemistry and stable (O and H) isotopes characteristics of samples from Yinggelike. Field investigation shows that the Yinggelike nephrite orebody occurs in the dolomitic marble near the intruding granitoids. Petrographic studies and EMPA data indicate that the nephrite is mainly composed of fine-grained tremolite, with accessory pargasite, diopside, epidote, allanite, prehnite, andesine, titanite, zircon, and calcite. Geochemical studies show that all nephrite samples have low bulk-rock Fe/(Fe + Mg) values (0.02–0.05), as well as low Cr (0.81–34.68 ppm), Co (1.10–2.91 ppm), and Ni (0.52–20.15 ppm) contents. Chondrite-normalized REE patterns of most samples exhibit strong to moderate negative Eu anomalies (0.04–0.67), moderate LREE enrichments, nearly flat HREE patterns, and low ΣREE contents (2.16–11.25 ppm). The nephrite samples have δ18O and δD values of 5.3 to 7.4‰ and –74.9 to –86.7‰, respectively. The mineralogy, bulk-rock chemistry, and O–H isotope characteristics are consistent with the dolomite-related nephrite classification. Based on mineral paragenetic relationships, three possible mineral crystallization stages are recognized: (1) diopside formed by prograde metasomatism; (2) nephrite jade formed by retrograde metasomatism and replacement of Stage I anhydrous minerals; (3) hydrothermal alteration after the nephrite formation. Features of transition metal contents indicate that the color of the Yinggelike nephrite is likely to be controlled by the Fe2+, Fe3+, and Mn. Yellowish color is related to Mn and especially Fe3+, while greenish color is related to Fe2+. Our new mineralogical and geochemical results on the Yinggelike nephrite provide better constraints on the formation of other nephrite deposits in the Altyn Tagh Mountains, and can facilitate future nephrite prospecting and research in the region.

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Nephrite Jade from Guangxi Province, China

Cited by 20 publications

References 2 publications

Shell Personal Ornaments Craft at the Site of Tha Kae, Lopburi Province, Central Thailand. Tracing the Southward Dispersal of the Drilling Technique

Shell Personal Ornaments Craft at the Site of Tha Kae, Lopburi Province, Central Thailand. Tracing the Southward Dispersal of the Drilling Technique

Soft Materials with Diverse Suprastructures via the Self-Assembly of Metal–Organic Complexes

Mineralogy and Geochemistry of Nephrite Jade from Yinggelike Deposit, Altyn Tagh (Xinjiang, NW China)

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