Zeolites and associated secondary minerals in the Deccan Traps of Western India

1974 ◽  
Vol 39 (306) ◽  
pp. 658-671 ◽  
Author(s):  
R. N. Sukheswala ◽  
R. K. Avasia ◽  
Maya Gangopadhyay
Keyword(s):  
Laboratory Data ◽  
Deccan Traps ◽  
Western India ◽  
Secondary Minerals ◽  
X Ray ◽  
Structural Disturbances ◽  
Intrusive Activity

SummaryZeolites (eight species) and the associated secondary minerals (minerals akin to zeolites, chlorites and related minerals, silica, and calcite) in the Deccan Traps of Western India have been examined in some detail on the basis of chemical, optical, and X-ray studies. The three zeolite zones (laumontite, scolecite, and heulandite, in ascending order) suggested by Walker have been recognized. Efforts have been made to understand their genesis. On available field and laboratory data it is suggested that the different zones of zeolitization are the result of increasing depth and the action of the circulating fluids on the rocks. The activity of such solutions was probably enhanced in the wake of the structural disturbances and intrusive activity that affected the rocks of this area.

scholarly journals Rietveld Structure Refinement of the Stilbite Crystals from Deccan Traps (India) Using X-ray Powder Diffraction Data

2019 ◽  
Vol 70 (7) ◽  
pp. 2379-2384
Author(s):  
Gheorghe Branoiu ◽  
Ibrahim Ramadan
Keyword(s):  
Crystal Structure ◽  
Rietveld Refinement ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Structure Refinement ◽  
Deccan Traps ◽  
Western India ◽  
Powder Diffraction Data ◽  
X Ray ◽  
Cell Parameters

The crystal structure of a spectacular sample of stilbite from Pune region located in the Deccan Traps (western India) has been refined using X-Ray powder diffraction data and the Rietveld method. The Rietveld refinement was carried out using the computer program Diffracplus TOPAS 4.1. The pseudo-Voigt (pV) profile function was used for the fit of the peaks. The Rietveld refinement of the analyzed sample in the space group C2/m (No.12): a=13.606 �, b=18.260 �, c=11.253 �, b=127.432�, Z=8, confirm the basic stilbite structure. The chemical composition of the stilbite crystals from Pune region (India) was determined by EDX analysis. The paper presents a new set of the unit cell parameters and fractional coordinates that define the stilbite crystal structure. The quality of the sample analyzed was pristine, the sample being collected from an association of apophyllite-stilbite crystals of centimetric dimensions.

scholarly journals Possible Pitfalls in the Analysis of Minerals and Loose Materials by Portable XRF, and How to Overcome Them

Minerals ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 33
Author(s):  
Valérie Laperche ◽  
Bruno Lemière
Keyword(s):  
Fluorescence Spectroscopy ◽  
Laboratory Data ◽  
Data Sets ◽  
Light Elements ◽  
Portable Xrf ◽  
X Ray ◽  
Protective Films ◽  
The Matrix ◽  
Valuable Complement ◽  
Physical Effects

Portable X-ray fluorescence spectroscopy is now widely used in almost any field of geoscience. Handheld XRF analysers are easy to use, and results are available in almost real time anywhere. However, the results do not always match laboratory analyses, and this may deter users. Rather than analytical issues, the bias often results from sample preparation differences. Instrument setup and analysis conditions need to be fully understood to avoid reporting erroneous results. The technique’s limitations must be kept in mind. We describe a number of issues and potential pitfalls observed from our experience and described in the literature. This includes the analytical mode and parameters; protective films; sample geometry and density, especially for light elements; analytical interferences between elements; physical effects of the matrix and sample condition, and more. Nevertheless, portable X-ray fluorescence spectroscopy (pXRF) results gathered with sufficient care by experienced users are both precise and reliable, if not fully accurate, and they can constitute robust data sets. Rather than being a substitute for laboratory analyses, pXRF measurements are a valuable complement to those. pXRF improves the quality and relevance of laboratory data sets.

Laboratory Data on the EUV/Soft-X-Ray Flux Problem of Fe xviii and Fe xix

2021 ◽  
Vol 913 (1) ◽  
pp. 20
Author(s):  
Elmar Träbert ◽  
Peter Beiersdorfer
Keyword(s):  
Laboratory Data ◽  
X Ray

Constraints on the Mantle Sources of the Deccan Traps from the Petrology and Geochemistry of the Basalts of Gujarat State (Western India)

1995 ◽  
Vol 36 (5) ◽  
pp. 1393-1432 ◽  
Author(s):  
L. MELLUSO ◽  
L. BECCALUVA ◽  
P. BROTZU ◽  
A. GREGNANIN ◽  
A. K. GUPTA ◽  
...  
Keyword(s):  
Deccan Traps ◽  
Western India ◽  
Gujarat State ◽  
Mantle Sources ◽  
Petrology And Geochemistry

Radiographic Findings in Early Onset Neonatal Group B Streptococcal Septicemia

PEDIATRICS ◽  
1977 ◽  
Vol 59 (6) ◽  
pp. 1006-1011
Author(s):  
John C. Leonidas ◽  
Robert T. Hall ◽  
Eugene C. Beatty ◽  
Richard A. Fellows
Keyword(s):  
Respiratory Distress ◽  
Distress Syndrome ◽  
Laboratory Data ◽  
Random Order ◽  
Radiographic Feature ◽  
Radiographic Appearance ◽  
Radiographic Findings ◽  
X Ray ◽  
Neonatal Group ◽  
Group B

Chest roentgenograms obtained in the first two days of life from 67 infants with respiratory distress were reviewed to determine whether the radiographic features of group B streptococcal septicemia were diagnostic or distinctive. The retrospective review contained 24 infants with proven and 14 with suspected septicemia, as well as 29 patients with other causes of respiratory distress. The films were reviewed ill random order by two pediatric radiologists without their prior knowledge of clinical or laboratory data. Typical radiographic appearance of pneumonia was present in only ten of the 24 proven and two of the 14 suspected cases of group B streptococcal sepsis. The radiographic pattern of respiratory distress syndrome (RDS) was just as common among these patients. The most prominent associated radiographic feature of infants with proven septicemia was cardiomegaly which was significantly increased when compared with infants who had other causes of respiratory distress (P < .001). X-ray recognition of neonatal group B streptococcal septicemia is limited because of superimposition of roentgen patterns probably related to associated disorders.

scholarly journals Influenza B Virus-associated Pneumonia in Pediatric Patients: Clinical Features, Laboratory Data, and Chest X-ray Findings

2014 ◽  
Vol 55 (1) ◽  
pp. 58-64 ◽  
Author(s):  
Chi-Yu Liu ◽  
Jiaan-Der Wang ◽  
Jen-Ta Yu ◽  
Li-Ching Wang ◽  
Ming-Chih Lin ◽  
...  
Keyword(s):  
Clinical Features ◽  
Pediatric Patients ◽  
Laboratory Data ◽  
Influenza B Virus ◽  
Influenza B ◽  
X Ray ◽  
B Virus ◽  
Chest X Ray

PreDICT: a graphical user interface to the DICVOL14 indexing software program for powder diffraction data

2019 ◽  
Vol 34 (3) ◽  
pp. 233-241 ◽  
Author(s):  
Justin R. Blanton ◽  
Robert J. Papoular ◽  
Daniel Louër
Keyword(s):  
Powder Diffraction ◽  
Laboratory Data ◽  
Graphical Interface ◽  
Powder Diffraction Data ◽  
X Ray ◽  
Moderate Number ◽  
Diffraction Patterns ◽  
User Friendly ◽  
Recent Version ◽  
Selection Of

A straightforward intuitive user-friendly compact graphical interface, PreDICT (Premier DICVOL Tool) has been developed to take full advantage of the new capabilities of the most recent version of the DICVOL14 Indexing Software. The latter, an updated version of DICVOL04, includes optimizations, e.g. for monoclinic and triclinic cases, a detailed review of the input data from the indexing solutions, cell centering tests, as well as the handling of a moderate number of impurity peaks. Among the most salient features of PreDICT, one can mention the ability (1) to use 2θ non-equistepped input 1D X-ray powder diffraction patterns as can be obtained from 2D detectors, (2) to strip laboratory data from its Kα2 contribution when present, (3) to generate 2θ equistepped output 1D X-ray powder diffraction patterns in both the “.XY” and “.GSA” formats. In addition, PreDICT allows for the following features: (1) full access to the native DICVOL14 input/output ASCII file system is retained, (2) for any selection of a DICVOL14 suggested unit cell, all predicted Bragg peaks up to a certain 2θMAX value are clearly displayed and indicated, thereby emphasizing the contribution of the unaccounted peaks (if any) to the 1D X-ray powder diffraction pattern under current investigation.

Cement render and mortar and their damages due to salt crystallization in the Holy Trinity Dominicans monastery in Cracow, Poland

2020 ◽  
Author(s):  
Mariola Marszałek ◽  
Krzysztof Dudek ◽  
Adam Gaweł ◽  
Jerzy Czerny
Keyword(s):  
Laboratory Tests ◽  
Mercury Intrusion Porosimetry ◽  
Cement Mortar ◽  
Salt Crystallization ◽  
Secondary Minerals ◽  
X Ray ◽  
Mercury Intrusion ◽  
Holy Trinity ◽  
Micro Raman Spectroscopy ◽  
Jurassic Limestone

<p>The presented investigations are focused on a part of the 13<sup>th</sup> century Church of the Holy Trinity Dominicans monastery in Cracow, Poland, and include the wall façade of the 17<sup>th </sup>century Myszkowski chapel. The chapel was probably designed by Santi Gucci Fiorentino and built by his workshop. Southern façade of the chapel is made of Tertiary limestone blocks that make characteristic rusticated wall. Lower part of the façade is covered with cement and the basement is made of irregular fragments of Jurassic limestone and Cretaceous sandstone partly replaced and bound with cement mortar. The façade revealed clear signs of damage ranging from dark gray soiling of the surface, scaling to efflorescences. The last ones – mainly on the border of limestone blocks and the cement in the part of the basement.</p><p>Laboratory tests included mineralogical, chemical and petrophysical analyses. Optical microscopy, scanning electron microscopy (SEM-EDS), micro-Raman spectroscopy and X-ray diffractometry (XRD) were used for analysing materials and deterioration products of the cement render and mortar. The petrophysical properties of the materials have been performed using mercury intrusion porosimetry. The secondary minerals detected include mainly gypsum CaSO<sub>4</sub>·2H<sub>2</sub>O, thenardite Na<sub>2</sub>SO<sub>4</sub>, <sub> </sub>aphthitalite (Na,K)<sub>3</sub>Na(SO<sub>4</sub>)<sub>2</sub>, darapskite, Na<sub>3</sub>(SO<sub>4</sub>)(NO<sub>3</sub>)·H<sub>2</sub>O, nitre KNO<sub>3</sub>, nitratine NaNO<sub>3</sub>, ettringite Ca<sub>6</sub>Al<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>(OH)<sub>12</sub>·26H<sub>2</sub>O and monosulphite Ca<sub>4</sub>Al<sub>2</sub>O<sub>6</sub>SO<sub>3</sub>·11H<sub>2</sub>O. Lower blocks of the façade covered with cement contain chiefly gypsum, ettringite and monosulphite, cement from the basement – gypsum and nitre; while efflorescences – thenardite, aphthitalite, darapskite, nitre and nitratine. The origin of the salts have been discussed and the differences in their type have been associated with composition of the materials and their physicochemical properties.</p><p>This work has been financially supported by the AGH University of Science and Technology, statutory grant no. 16.16.140.315.</p>

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