scholarly journals Paragenesis Prospek Endapan Bijih Besi Daerah Tanjung Kecamatan Bontocani Kabupaten Bone, Sulawesi Selatan

2021 ◽  
Vol 9 (2) ◽  
pp. 179-186
Author(s):  
Hasbi Bakri ◽  
Harwan Harwan ◽  
Alam Budiman Thamsi ◽  
Irzal Nur ◽  
Firdaus F ◽  
...  
Keyword(s):  
Data Collection ◽  
Diffraction Analysis ◽  
Iron Ore ◽  
Laboratory Analysis ◽  
Field Conditions ◽  
Mineral Deposits ◽  
X Ray Diffraction ◽  
X Ray ◽  
Random Samples ◽  
Data Collection Technique

Iron ore is the second most abundant metal on earth. The characteristics of this iron ore usually consist of iron ore carrier minerals associated with other minerals. One area that has iron ore prospects is the Tanjung area, Bontocani District, Bone Regency. The purpose of this study was to determine the types of iron ore carrier minerals and their associations, mineralization characteristics and paragenesis of iron ore carrier minerals. The data collection technique is carried out directly in the field by taking random samples in the field according to field conditions. Laboratory analysis uses mineragraphic analysis to determine iron ore carrier minerals and their associated minerals and X-Ray Diffraction analysis to determine iron ore carrier minerals that are not identified by mineragraphic analysis. From the results of the study found iron ore carrier minerals magnetite, goethite and hematite and their associated minerals in the form of sulfide minerals in the form of pyrite, covelite and braunite. The iron ore textures found are replacement and intergrowth textures. Paragenesis of mineral deposits formed successively are magnetite, hematite, pyrite, cuprite, braunite and goethite.

A simple technique to control macromolecular crystal nucleation efficiently using a standard vapour-diffusion setup

2000 ◽  
Vol 33 (3) ◽  
pp. 988-989 ◽  
Author(s):  
Luca Jovine
Keyword(s):  
Data Collection ◽  
Diffraction Analysis ◽  
Vapour Pressure ◽  
Simple Technique ◽  
Crystal Nucleation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Vapour Diffusion ◽  
Discrete Amount ◽  
Set Up

Excessive nucleation often leads to a large number of small macromolecular crystals that are not useful for X-ray diffraction analysis. Crystals with dimensions suitable for data collection can be reproducibly obtained by releasing, for a discrete amount of time, the vapour pressure in both hanging- and sitting-drop experiments, set up at lower precipitant concentrations than those required for crystallization.

scholarly journals XRF and powder X-ray diffraction analysis of ancient iron slags from the “Sladak Kladenets” and “Malko Dryanovo” archaeological sites, Bulgaria

2021 ◽  
Vol 82 (3) ◽  
pp. 253-255
Author(s):  
Bilyana Kostova ◽  
Boyan Dumanov ◽  
Zhivko Uzunov ◽  
Ventseslav Stoyanov ◽  
Boyka Zlateva
Keyword(s):  
Phase Composition ◽  
Diffraction Analysis ◽  
Iron Ore ◽  
Archaeological Sites ◽  
Metallurgical Process ◽  
X Ray Diffraction ◽  
Furnace Temperature ◽  
X Ray ◽  
Ancient Iron ◽  
Operating Furnace

Using X-ray fluorescence and Powder X-ray diffraction analysis, the chemical and phase composition of ancient iron slags and raw iron ore were investigated. The type of raw ore was identified as self-fluxing. The operating furnace temperature was determined in the range 900–1000 °C. The results obtained are of archaeological importance. They will contribute to the chronological specification of the time of realization of the metallurgical process and the type of used furnaces.

Ten-Vertex Polyhedral Monocarbaborane Chemistry. The Novel High-Yield Formation of the Ten-Vertex closo Compound [6-(PMe2Ph)-closo-1-CB9H9] from the Thermolysis of [8,8-(PMe2Ph)2-nido-8,7-PtCB9H11]

1993 ◽  
Vol 58 (12) ◽  
pp. 2924-2935 ◽  
Author(s):  
Jane H. Jones ◽  
Bohumil Štíbr ◽  
John D. Kennedy ◽  
Mark Thornton-Pett
Keyword(s):  
Nmr Spectroscopy ◽  
Diffraction Analysis ◽  
High Yield ◽  
Monoclinic Space Group ◽  
The Novel ◽  
X Ray Diffraction ◽  
Metal Centre ◽  
X Ray ◽  
Yield Formation ◽  
Boiling Toluene

Thermolysis of [8,8-(PMe2Ph)2-nido-8,7-PtCB9H11] in boiling toluene solution results in an elimination of the platinum centre and cluster closure to give the ten-vertex closo species [6-(PMe2Ph)-closo-1-CB9H9] in 85% yield as a colourles air stable solid. The product is characterized by NMR spectroscopy and single-crystal X-ray diffraction analysis. Crystals (from hexane-dichloromethane) are monoclinic, space group P21/c, with a = 903.20(9), b = 1 481.86(11), c = 2 320.0(2) pm, β = 97.860(7)° and Z = 8, and the structure has been refined to R(Rw) = 0.045(0.051) for 3 281 observed reflections with Fo > 2.0σ(Fo). The clean high-yield elimination of a metal centre from a polyhedral metallaborane or metallaheteroborane species is very rare.

Bis(μ-carboxylato)dienerhodium(I) Complexes - Synthesis, Characterization and Catalytic Activity

2008 ◽  
Vol 73 (8-9) ◽  
pp. 1205-1221 ◽  
Author(s):  
Jiří Zedník ◽  
Jan Sedláček ◽  
Jan Svoboda ◽  
Jiří Vohlídal ◽  
Dmitrij Bondarev ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Diffraction Analysis ◽  
Spectroscopic Methods ◽  
X Ray Diffraction ◽  
X Ray

Dinuclear rhodium(I) η2:η2-cycloocta-1,5-diene (series a) and η2:η2-norborna-2,5-diene (series b) complexes with μ-RCOO- ligands, where R is linear C21H43 (complexes 1a, 1b), CH2CMe3 (2a, 2b), 1-adamantyl (3a, 3b) and benzyl (4a, 4b), have been prepared and characterized by spectroscopic methods. Structures of complexes 2b, 3a and 4a were determined by X-ray diffraction analysis. Complexes prepared show low to moderate catalytic activity in polymerization of phenylacetylene in THF giving high-cis-transoid polymers, but they show only oligomerization activity in dichloromethane.

scholarly journals Crystals of the trp repressor-operator complex suitable for X-ray diffraction analysis.

1987 ◽  
Vol 262 (10) ◽  
pp. 4917-4921 ◽  
Author(s):  
A. Joachimiak ◽  
R.Q. Marmorstein ◽  
R.W. Schevitz ◽  
W. Mandecki ◽  
J.L. Fox ◽  
...  
Keyword(s):  
Diffraction Analysis ◽  
X Ray Diffraction ◽  
Trp Repressor ◽  
X Ray
Sign in / Sign up

Export Citation Format

Share Document