Twin sample chamber for simultaneous comparative transport measurements in a diamond anvil cell

2013 ◽  
Vol 84 (9) ◽  
pp. 095108 ◽  
Author(s):  
Anne Marie J. Schaeffer ◽  
Shanti Deemyad
Keyword(s):  
Diamond Anvil Cell ◽  
Transport Measurements ◽  
Sample Chamber ◽  
Diamond Anvil

scholarly journals Homogenization Experiments of Crystal-Rich Inclusions in Spodumene from Jiajika Lithium Deposit, China, under Elevated External Pressures in a Hydrothermal Diamond-Anvil Cell

Geofluids ◽  
2017 ◽  
Vol 2017 ◽  
pp. 1-12 ◽  
Author(s):  
Jiankang Li ◽  
I-Ming Chou
Keyword(s):  
Diamond Anvil Cell ◽  
Aqueous Fluid ◽  
Formation Mechanisms ◽  
External Pressures ◽  
Sample Chamber ◽  
New Type ◽  
Diamond Anvil ◽  
In Situ Observations ◽  
Total Dissolution

Extensive studies of the crystal-rich inclusions (CIs) hosted in minerals in pegmatite have resulted in substantially different models for the formation mechanism of the pegmatite. In order to evaluate these previously proposed formation mechanisms, the total homogenization processes of CIs hosted in spodumene from the Jiajika pegmatite deposit in Sichuan, China, were observed in situ under external H2O pressures in a new type of hydrothermal diamond-anvil cell (HDAC). The CIs in a spodumene chip were loaded in the sample chamber of HDAC with water, such that the CIs were under preset external H2O pressures during heating to avoid possible decrepitation. Our in situ observations showed that the crystals within the CIs were dissolved in carbonic-rich aqueous fluid during heating and that cristobalite was usually the first mineral being dissolved, followed by zabuyelite and silicate minerals until their total dissolution at temperatures between 500 and 720°C. These observations indicated that the minerals within the CIs were daughter minerals crystallized from an entrapped carbonate- and silica-rich aqueous solution and therefore provided useful information for evaluating the formation models of granitic pegmatites.

New diamond anvil cell for optical and transport measurements under high magnetic fields up to 60 T

2008 ◽  
Vol 28 (4) ◽  
pp. 627-631 ◽  
Author(s):  
Marius Millot ◽  
Sylvie George ◽  
Jean-Marc Broto ◽  
Bernard Couzinet ◽  
Jean-Claude Chervin ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Diamond Anvil Cell ◽  
High Magnetic Fields ◽  
Transport Measurements ◽  
Diamond Anvil

scholarly journals Fluorine chemistry at extreme conditions: possible synthesis of $HgF_4$

2019 ◽  
Vol 11 ◽  
pp. 110001 ◽  
Author(s):  
Michael G. Pravica ◽  
Sarah Schyck ◽  
Blake Harris ◽  
Petrika Cifligu ◽  
Eunja Kim ◽  
...  
Keyword(s):  
Pressure Range ◽  
Diamond Anvil Cell ◽  
Theoretical Calculations ◽  
Far Infrared ◽  
X Rays ◽  
Creative Commons ◽  
Pressure Cycling ◽  
Spectral Changes ◽  
Sample Chamber ◽  
Diamond Anvil

By irradiating a pressurized mixture of a fluorine-bearing compound ($XeF_2$) and $HgF_2$ with synchrotron hard x-rays (>7 keV) inside a diamond anvil cell, we have observed dramatic changes in the far-infrared spectrum within the 30-35 GPa pressure range which suggest that we may have formed $HgF_4$ in the following way: $XeF_2 \xrightarrow{hv} Xe + F_2$ (photochemically) and $HgF_2 + F_2 \rightarrow HgF_4$ (30 GPa < P < 35 GPa). This lends credence to recent theoretical calculations by Botana et al. that suggest that Hg may behave as a transition metal at high pressure in an environment with an excess of molecular fluorine. The spectral changes were observed to be reversible during pressure cycling above and below the above mentioned pressure range until a certain point when we suspect that molecular fluorine diffused out of the sample at lower pressure. Upon pressure release, $HgF_2$ and trace $XeF_2$ were observed to be remaining in the sample chamber suggesting that much of the $Xe$ and $F_2$ diffused and leaked out from the sample chamber.   Received: 29 October 2018,  Accepted: 18 January 2019; Edited by: A. Goñi, A. Cantarero, J. S. Reparaz; DOI: http://dx.doi.org/10.4279/PIP.110001 Cite as: M Pravica, S Schyck, B Harris, P Cifligu, E Kim, B Billinghurst, Papers in Physics 11, 110001 (2019). This paper, by M Pravica, S Schyck, B Harris, P Cifligu, E Kim, B Billinghurst, is licensed under the Creative Commons Attribution License 4.0.  

Transport measurements at low temperatures in a diamond anvil cell with helium as pressure medium

1997 ◽  
Vol 68 (3) ◽  
pp. 1514-1517 ◽  
Author(s):  
J. Thomasson ◽  
Y. Dumont ◽  
J.-C. Griveau ◽  
C. Ayache
Keyword(s):  
Low Temperatures ◽  
Diamond Anvil Cell ◽  
Transport Measurements ◽  
Pressure Medium ◽  
Diamond Anvil

Cassiterite crystallization experiments in alkali carbonate aqueous solutions using a hydrothermal diamond-anvil cell

2020 ◽  
Vol 105 (5) ◽  
pp. 664-673
Author(s):  
Yongchao Liu ◽  
Jiankang Li ◽  
I-Ming Chou
Keyword(s):  
Aqueous Solution ◽  
Diamond Anvil Cell ◽  
Rare Metal ◽  
Granitic Pegmatite ◽  
Melt And Fluid Inclusions ◽  
Crystallization Experiments ◽  
Alkali Carbonate ◽  
Alkaline Conditions ◽  
Sample Chamber ◽  
Diamond Anvil

Abstract Ore-forming fluids enriched in alkali carbonate are commonly observed in natural melt and fluid inclusions associated with tin mineralization, particularly in granitic pegmatite. However, the roles of alkali carbonates remain unclear. Hence, to investigate the roles of alkali carbonate, herein, cassiterite (SnO2) crystallization experiments in SnO2–Li2CO3–H2O and SnO2–Na2CO3–H2O systems were conducted using a hydrothermal diamond-anvil cell. The results showed that SnO2 could dissolve into the alkali carbonate aqueous solution during heating, and long prismatic cassiterite crystals grew during the subsequent cooling stage at average rates of 0.61 × 10–6 to 8.22 × 10–6 cm/s in length and 3.40–19.07 μm3/s in volume. The mole fraction of cassiterite crystallized from the SnO2–Li2CO3–H2O system ranges from 0.03 to 0.41 mol%, which depends on the Li2CO3 content dissolved in the aqueous solution. In situ Raman analysis of the alkali carbonate-rich aqueous solution in the sample chamber suggests that the dissolution of SnO2 can be attributed to the alkaline conditions produced by hydrolysis of alkali carbonate in which Sn(OH)62− may be a potential tin-transporting species. The cassiterite crystallization conditions obtained in our SnO2–alkali carbonate–H2O systems primarily fell within the 400–850 °C and 300–850 MPa temperature and pressure ranges, respectively; furthermore, cassiterite crystallization ended in rare metal pegmatite-forming conditions. These crystallization features of cassiterite are similar to those formed in tin-mineralized granitic pegmatites. It indicates that an alkali carbonate-rich aqueous solution or hydrous melt can work as a favorable transport medium for tin and provides the necessary conditions for cassiterite crystallization in granitic pegmatite, bearing the roles in decreasing the viscosity of hydrous melts and enhancing the solubility of SnO2 in ore-forming melts or fluids. These roles of alkali carbonate can also be extended for the mineralization of other rare metals (e.g., Li and Be) in granitic pegmatite.

scholarly journals Diamond anvil cell with boron-doped diamond heater for high-pressure synthesis and in situ transport measurements

2021 ◽  
Vol 119 (5) ◽  
pp. 053502
Author(s):  
Ryo Matsumoto ◽  
Sayaka Yamamoto ◽  
Shintaro Adachi ◽  
Takeshi Sakai ◽  
Tetsuo Irifune ◽  
...  
Keyword(s):  
High Pressure ◽  
Diamond Anvil Cell ◽  
Boron Doped Diamond ◽  
High Pressure Synthesis ◽  
Boron Doped ◽  
Transport Measurements ◽  
Diamond Anvil ◽  
Pressure Synthesis

scholarly journals Bulk modulus of H2O across the ice VII–ice X transition measured by time-resolved x-ray diffraction in dynamic diamond anvil cell experiments

2021 ◽  
Vol 103 (6) ◽  
Author(s):  
A. S. J. Méndez ◽  
F. Trybel ◽  
R. J. Husband ◽  
G. Steinle-Neumann ◽  
H.-P. Liermann ◽  
...  
Keyword(s):  
Bulk Modulus ◽  
Diamond Anvil Cell ◽  
X Ray Diffraction ◽  
Time Resolved ◽  
X Ray ◽  
Diamond Anvil
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