scholarly journals Raman spectra of gas mixtures in fluid inclusions: Effect of quartz birefringence on composition measurement

2019 ◽  
Vol 51 (9) ◽  
pp. 1868-1873
Author(s):  
Marie‐Camille Caumon ◽  
Alexandre Tarantola ◽  
Wenjing Wang
Keyword(s):  
Raman Spectra ◽  
Fluid Inclusions ◽  
Gas Mixtures ◽  
Composition Measurement

scholarly journals Arsenic and Antimony Doping: An Attempt to Deposit n-type CVD Diamond

2007 ◽  
Vol 1039 ◽  
Author(s):  
Paul William May ◽  
Martin Davey ◽  
Keith N Rosser ◽  
Peter J Heard
Keyword(s):  
Electrical Conductivity ◽  
Gas Phase ◽  
Raman Spectra ◽  
Diamond Film ◽  
Cvd Diamond ◽  
Gas Mixtures ◽  
Antimony Doping ◽  
Hot Filament ◽  
Incorporation Efficiency

AbstractWe report the results of experiments that attempt to deposit n-type CVD diamond in a standard hot filament reactor using 1%CH4/H2 gas mixtures, using (i) AsH3 as a gas phase source of arsenic, and (ii) evaporated Sb or Sb(Ph)3 as a source of antimony. SIMS measurements revealed that under these conditions, neither Sb nor As is incorporated into the diamond film, and the Raman spectra, electrical conductivity and crystallite morphology remain unchanged from that of undoped diamond. These experiments confirm the predicted low incorporation efficiency for As and Sb, and we conclude that doping CVD diamond with these elements cannot readily be achieved in this manner.

Raman spectra of ice and salt hydrates in synthetic fluid inclusions

2010 ◽  
Vol 275 (1-2) ◽  
pp. 58-66 ◽  
Author(s):  
Miriam Baumgartner ◽  
Ronald J. Bakker
Keyword(s):  
Raman Spectra ◽  
Fluid Inclusions ◽  
Synthetic Fluid Inclusions ◽  
Salt Hydrates

Raman spectra of water in fluid inclusions: I. Effect of host mineral birefringence on salinity measurement

2015 ◽  
Vol 46 (10) ◽  
pp. 969-976 ◽  
Author(s):  
Marie-Camille Caumon ◽  
Alexandre Tarantola ◽  
Régine Mosser-Ruck
Keyword(s):  
Raman Spectra ◽  
Fluid Inclusions ◽  
Host Mineral

scholarly journals Phase transitions in natural C-O-H-N-S fluid inclusions - implications for gas mixtures and the behavior of solid H2S at low temperatures

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Marta Sośnicka ◽  
Volker Lüders
Keyword(s):  
Phase Transitions ◽  
Low Temperature ◽  
Fluid Inclusions ◽  
Gas Mixtures ◽  
Complete Sequence ◽  
Future Research ◽  
Raman Spectroscopic ◽  
Fluid Systems ◽  
Phase Transition Temperatures ◽  
World Class

AbstractC–O–H–N–S-bearing fluids are known as one of the most challenging geochemical systems due to scarcity of available experimental data. H2S-rich fluid systems were recognized in a wide array of world-class mineral deposits and hydrocarbon reservoirs. Here we report on a nature of low-temperature (T ≥ −192 °C) phase transitions observed in natural CH4–H2S–CO2–N2–H2O fluid inclusions, which are modeled as closed thermodynamic systems and thus serve as natural micro-laboratories representative of the C–O–H–N–S system. For the first time, we document solid–solid H2S (α ↔ β ↔ γ) transitions, complex clathrates and structural transformations of solid state H2S in natural inclusion gas mixtures. The new data on Raman spectroscopic features and a complete sequence of phase transition temperatures in the gas mixtures contribute to scientific advancements in fluid geochemistry. Enhanced understanding of the phase equilibria in the C–O–H–N–S system is a prerequisite for conscientious estimation of P-T-V-X properties, necessary to model the geologic evolution of hydrocarbon and mineral systems. Our findings are a driver for the future research expeditions to extraterrestrial H2S-rich planetary systems owing to their low temperature environments.

scholarly journals Discovery of Disulfane (H2S2) in Fluid Inclusions in Rubies from Yuanjiang, China, and Its Implications

Crystals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1305
Author(s):  
Wenqing Huang ◽  
Pei Ni ◽  
Jungui Zhou ◽  
Ting Shui ◽  
Junying Ding ◽  
...  
Keyword(s):  
Raman Spectra ◽  
Fluid Inclusions ◽  
Elemental Sulfur ◽  
Elevated Temperatures ◽  
Red River ◽  
Sedimentary Sequence ◽  
Geological Samples ◽  
Metamorphic Belt ◽  
Facies Metamorphism

Raman spectra of fluid inclusions in gem rubies from Yuanjiang deposit (China) within the Ailao Shan-Red River (ASRR) metamorphic belt showed the presence of compounds such as CO2, COS, CH4, H2S, and elemental sulfur (S8), accompanied by two bands at approximately 2499 and 2570 cm−1. These two frequencies could be assigned to the vibrations of disulfane (H2S2). This is the second case of the sulfane-bearing fluid inclusions in geological samples reported, followed by the first in quartzite from Bastar Craton of India. The H2S2 was likely in situ enclosed by the host rubies rather than a reaction product that formed during the cooling of H2S and S8, suggesting sulfanes are stable at elevated temperatures (e.g., >600 °C). By comparing the lithologies and metamorphic conditions of these two sulfane-bearing cases (Bastar and Yuanjiang), it is suggested that amphibolite facies metamorphism of sedimentary sequence that deposited in a continental platform setting might favor the generation of sulfanes. Sulfanes may play an important role in the mobilization of Cr that is essential for ruby crystallization.

How to Make Raman-Inactive Helium Visible in Raman Spectra of Tritium-Helium Gas Mixtures

2015 ◽  
Vol 67 (3) ◽  
pp. 559-562 ◽  
Author(s):  
Magnus Schlösser ◽  
Oskari Pakari ◽  
Simone Rupp ◽  
Sebastian Mirz ◽  
Sebastian Fischer
Keyword(s):  
Raman Spectra ◽  
Gas Mixtures ◽  
Helium Gas

New achievements in the mineral studies by use of the Raman microspectroscopy

2019 ◽  
Vol 474 (474) ◽  
pp. 23-30
Author(s):  
Katarzyna JARMOŁOWICZ-SZULC ◽  
Krystyna WOŁKOWICZ
Keyword(s):  
Raman Spectra ◽  
Fluid Inclusions ◽  
Gas Composition ◽  
Vein Quartz ◽  
Inclusion Content ◽  
The Carpathians ◽  
The Earth ◽  
History Of ◽  
Tectonic Mélange ◽  
Raman Microspectrometry

By the means of the technique of the Raman microspectrometry, the complex history of the Earth can be better understood. That is why the Raman spectra determinations are the object of interest in the present paper. The examples of such experiments are presented based on the analyses performed in last years in different scientific centers (Potsdam, Banská Bystrica, Budapest). The identification of inclusion content is shown and the conclusions are drawn for fluid inclusions in some quartz samples from two different localities in Poland – in the Carpathians and in the Fore-Sudetic Block. The implications of the Raman analyses are discussed. It results from the Raman analyses performed that not fluorescing, gas-filled bubbles of huge fluid inclusions from the Jabłonki and Rabe vicinity (the tectonic mélange zone in the Carpathians) have the complex composition of CH4, CO2 and N2 in different mutual proportions dependent on the sample and locality. In another place, despite the fluorescing background, only methane has been identified by Raman spectra. Similar gas composition was determined in the inclusions in the vein quartz in the Wądroże Wielkie area (the Fore-Sudetic Block).

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