Suche
Anzeige der Dokumente 101-110 von 567
Pressure‐induced Pb–Pb bonding and phase transition in Pb2SnO4
(
- Acta Crystallographica Section B
, 2020-11-11)
High‐pressure single‐crystal to 20 GPa and powder diffraction measurements to 50 GPa, show that the structure of Pb2SnO4 strongly distorts on compression with an elongation of one axis. A structural phase transition occurs ...
Elastic stiffness coefficients of thiourea from thermal diffuse scattering
(
- Journal of Applied Crystallography
, 2021-01-29)
The complete elastic stiffness tensor of thiourea has been determined from thermal diffuse scattering (TDS) using high‐energy photons (100 keV). Comparison with earlier data confirms a very good agreement of the tensor ...
Arsenic release from a natural rock under near-natural oxidizing conditions
(
- Engineering in life sciences
, 2008)
The solubilization of arsenic (As) from an ore material (native Arsenic [As, trig.] with Lollingite [FeAs2, rh.]) was characterized in leaching tests lasting for ≤ 99 days. The experiments were performed with materials of ...
Radiocarbon Evidence for the Contribution of the Southern Indian Ocean to the Evolution of Atmospheric CO2 Over the Last 32,000 Years
(
- Paleoceanography and Paleoclimatology
, 2020)
It is widely assumed that the ventilation of the Southern Ocean played a crucial role in driving glacial-interglacial atmospheric CO2 levels. So far, however, ventilation records from the Indian sector of the Southern Ocean ...
Experimental deformation of jadeite
(Univ. Bochum, 2002)
Zur Untersuchung der Rheologie der Mischkristallreihe Jadeit-Diopsid wurden experimentelle Untersuchungen am Endglied Jadeit durchgeführt. Polykristalline Jadeit Proben wurden aus einem Glas in einer Stempel-Zylinder-Apparatur ...
Long‐term intercomparison of two pCO2 instruments based on ship‐of‐opportunity measurements in a dynamic shelf sea environment
(
- Limnology and Oceanography: Methods
, 2020-12-28)
The partial pressure of carbon dioxide (pCO2) in surface seawater is an important biogeochemical variable because, together with the pCO2 in the atmosphere, it determines the direction of air–sea carbon dioxide exchange. ...
High‐temperature treatments of niobium under high vacuum, dilute air‐ and nitrogen‐atmospheres as investigated by in situ X‐ray absorption spectroscopy
(
- Journal of Synchrotron Radiation
, 2020-12-18)
Niobium metal foils were heat‐treated at 900°C under different conditions and in situ investigated with time‐resolved X‐ray absorption fine‐structure (EXAFS and XANES) measurements. The present study aims to mimic the ...
Concepts for nondestructive and depth‐resolved X‐ray residual stress analysis in the near‐surface region of nearly single crystalline materials with mosaic structure
(
- Journal of Applied Crystallography
, 2020-12-02)
Two evaluation concepts for nondestructive depth‐resolved X‐ray residual stress analysis in the near‐surface region of materials with cubic symmetry and nearly single crystalline structure are introduced by simulated ...
Inter‐laboratory Characterisation of Apatite Reference Materials for Chlorine Isotope Analysis
(
- Geostandards and Geoanalytical Research
, 2020-12-25)
Here we report on a set of six apatite reference materials (chlorapatites MGMH#133648, TUBAF#38 and fluorapatites MGMH#128441A, TUBAF#37, 40, 50) which we have characterised for their chlorine isotope ratios; these RMs ...