Centro de conhecimento

This application note describes how X-ray diffraction (XRD) studies can be used in the study of coal and coal-related materials. Mineral phases identified and quantified in raw coal are quartz, kaolinite, and minor amounts of calcite, dolomite, siderite and anatase. High-speed XRD systems such as the CubiX3 Minerals equipped with the X'Celerator detector allow the use of standardless methods such as Rietveld refinement for non-destructive analysis of coal and coal-related products. This method, therefore, provides a fast and reliable alternative to time- consuming traditional methods.

Produtos:

CubiX3 Iron

Data:

July 20 2017

Idioma:

English

This note compares the use of three different methods – X-ray diffraction, near infrared spectroscopy and differential scanning calorimetry – for quantifying small amounts of amorphous material in a crystalline matrix, and vice versa. In this investigation we used alphalactose monohydrate as a model substance. In the pharmaceutical industry this material is widely employed as a filler and diluent in tablets and capsules, as a carrier substance in dry powder inhalers and as a lyoprotectant during the freeze-drying of proteins.

Produtos:

CubiX3 Pharma

Data:

July 20 2017

Idioma:

English

This application note describes the texture analysis of a rolled copper specimen. The experimental data were measured on a multi-purpose X-ray diffraction system equipped with a texture cradle. In polycrystalline solid materials, such as a wide class of metals and ceramics, usually the orientation of the crystallites, constituting the matrial, is not distributed randomly, like in an ideal powder specimen. In most cases a preferred orientation of the crystallites with respect to the sample reference frame is present. In materials science this preferred orientation is referred to as texture.

Produtos:

X'Pert3 MRD (XL)

Data:

July 20 2017

Idioma:

English

XRD can be used for fast and accurate cluster analysis, phase identification and quantification of the minerals present in iron ore. The ore contains phases as hematite, goethite and magnetite as well as the gangue minerals gibbsite Al(OH)3, kaolinite Al2Si2O5(OH)4 and quartz SiO2. In addition, different XRD methods can distinguish between goethite with varying Al contents. Theoretical grade blocks can be defined on the basis of the mineralogy determined by XRD, indicating ore grades that can be effectively and economically upgraded in the concentrator. Exploration of iron ore deposits can be done using cluster analysis. This method can distinguish between different ore grades and facilitate multidimensional compositional mapping of ore deposits. Cluster analysis identifies regions of favorable mineral compositions without detailed knowledge about the phase content.

Produtos:

CubiX3 Iron

Data:

July 20 2017

Idioma:

English

This application note demonstrates the performance of the Axios FAST XRF spectrometer for the analysis of Al-Si and Al-Mg alloys. Accurate and fast elemental analysis during the production process of aluminum and its base materials is a critical requirement. Measurements were performed using an Axios FAST simultaneous X-ray fluorescence spectrometer equipped with a 4 kW Rh SST-mAX X-ray tube.

Produtos:

Axios FAST

Data:

July 20 2017

Idioma:

English

This application note demonstrates the performance of the Axios FAST XRF spectrometer for the analysis of low-alloy, ferritic and austenitic steels. Accurate and fast elemental analysis during the production process of steel and its base materials is a critical requirement. Measurements were performed using an Axios FAST simultaneous X-ray fluorescence spectrometer equipped with a 4 kW Rh SST-mAX X-ray tube.

Produtos:

Axios FAST

Data:

July 20 2017

Idioma:

English

In September 2007, NRL, in partnership with multiple institutions, undertook a combined airborne multi-sensor remote sensing campaign and in situ validation effort. The experiment, VCR’07, took place at the Virginia Coast Reserve (VCR), a National Science Foundation–funded Long Term Ecological Research (LTER) Site on the Eastern Shore of Virginia. The study area comprised an 1880 km2 region of barrier islands, shallow water lagoons, and mainland marsh systems (Fig. 4). This article describes the results of a subset of experiments conducted during the campaign demonstrating the retrieval of soil bearing strength directly from hyperspectral remote sensing on the VCR barrier islands. Bearing strength, or “trafficability,” is a key parameter needed by military planners to identify littoral penetration points. The study also developed and tested new methods for retrieval of shallow water bathymetry, another important parameter needed by amphibious craft during landing..

Produtos:

ASD HandHeld 2

Data:

August 2 2017

Idioma:

English

International standard test methods used for the determination of Mg, P, S, Cl, Ca, Cu, Zn and Ba in unused lubricating oil samples by means of WDXRF include ASTM D4927 and ASTM D6443. In this study we have set up calibrations in accordance with the methods stipulated in both ASTM norms. XRF is an excellent method for the multi-elemental analysis of new lubricating oils for the purposes of quality control, product development and product performance classification. It produces fast, cost-effective, precise and accurate data with a minimum of operator dependence.

Produtos:

The Petro edition of Zetium

Data:

August 2 2017

Idioma:

English

Volcanogenic massive sulphide deposits generally have zoned mineral alteration systems related to the hydrothermal circulation cells that led to their formation. In ideal situations it is possible to use field observations of such alteration to vector toward potential ore horizons. However, in many cases, such reasoning relies on subsequent detailed petrographic and lithogeochemical investigations; but the fine-grained and cryptic nature of much of the alteration may be an obstacle. A relatively new technique that may alleviate such delays is the use of portable reflectance spectrometers that provide visible/infrared spectroscopy (VIRS). This allows field identification of alteration minerals and compositional inferences that may constitute vectors to potential ore horizons.. Visible/infrared spectroscopy methods were applied to two of the volcanogenic massive sulphide deposits in the Tulks Volcanic Belt of central Newfoundland, namely the Daniels Pond and Boomerang deposits. Both deposits have ubiquitous white mica and chlorite alteration, and mineralogical zonation in the field is poorly developed. Identification of such zonation is further hindered by the inherent lack of outcrop in the vicinity of the deposits.. Results from both deposits, and regional rock sample suites, illustrate a distinct shift in the wavelengths of the Al-OH absorption feature in white micas from distal to proximal environments. The Al-OH absorption feature in white micas distal to ore is generally at >2000 nm (i.e., muscovite to phengite composition), whereas the absorption feature shifts to lower wavelengths (<2000 nm) in samples proximal to ore (i.e., paragonite composition). The VIRS data thus record subtle variations in alteration mineral chemistry that would otherwise be difficult to detect, and which may provide a directional indicator (vector) to favourable horizons..

Objectives:. (i) to estimate mineralogical composition specifically clay mineralogy from the spectra, (ii) to qualitatively compare mineral concentrations calculated from XRF and XRD analyses, as well as mineral groups identified through SEM and microscopic petrography work with NIR results.. NIR spectroscopy has been widely used in different scientific fields such as biology and medicine. However, it has been rarely used in mineral identification in finer sedimentary rocks specifically mudrocks. This work will allow us to verify the accuracy of this technique compared with XRF and XRD..

Produtos:

Linha ASD

Data:

May 25 2018

Idioma:

English