[en] Process features of producing of magnesium astringent substances on the base of magnesite and dolomite and their characteristic arc examined. The potential possibility of creation of compositional material based on caustic dolomite, that was obtained from natural dolomite raw materials of Belarus, for immobilization of radioactive waste is presented. (authors).

[en] The paper presents dosimetric characteristics of special graphite-mixed magnesium borate thermoluminescent dosimeter for beta-ray dosimetry, developed at Boris Kidric Institute Vinca. Sintered graphite-mixed MgB₄0₇: Dy, C Tl dosimeters are attractive for beta-ray dosimetry because this material combines low transparency with near tissue-equivalence and high sensitivity. Released skin-dose equivalent sintered magnesium borate TL-dosimeters give the possibility for skin dose assessment from low-energy beta emitters which is required by ICRP recommendations. It is also given the results from practical use of graphite mixed magnesium borate TLD a various laboratories at Risoe National Laboratory, Roskilde, Denmark. (Author)

[en] The crystal structure of rutile-type magnesium deuteride, α-MgD₂, has been studied by in situ neutron powder diffraction at room temperature and pressures up to 9.3 GPa. The bulk modulus B₀ = 49(2) GPa is about half, the linear compressibilities (0.0063/GPa along a and 0.0041/GPa along c) are about twice and the variation of the free positional parameter x about six times the values for the isostructural magnesium fluoride, indicating the strong polarizability of the deuteride anion. Under pressure the MgD₆ octahedra are more compressed (four Mg-D distances at 199(1), two at 173(1) pm) than at ambient pressure (195.1(1), 194.8(2) pm) and the structural arrangement becomes more CaCl₂ like, although no structural phase transition has been observed. (orig.)

[en] The products MgB₆O₁₀x8H₂O, CaB₄O₇x6H₂O of the interaction of systems H₃BO₃-Ca(CH₃CH₂COO)₂-H₂O and H₃BO₃-Mg(CH₃CH₂COO)₂-H₂O separated at 50 deg C, are studied using the methods of DTA and IR spectroscopy. The results of thermal decomposition and IR absorption spectra confirm their individuality. A supposition is made on the structure of the compounds prepared

[en] This issue is the collection of the papers presented at the title meeting on thermoluminescence and its application. The 5 of the presented papers are indexed individually. (J.P.N.)

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[en] Magnesium hydroxyapatite coatings (MgHAp) were deposited on the surface of 316L stainless steel (316L SS) substrates by electrodeposition technique. Different concentrations of Mg''2''+ ion were incorporated into the apatite structure by adding Mg(NO₃)₂ into electrolyte solution containing 3x10''-''2 M Ca(NO₃)₂, 1.8x10''-''2 M NH₄H₂PO₄ and 6x10''-''2 M NaNO₃. With Mg''2''+ concentration 1x10''-''3 M, the obtained coatings have 0.2 wt% Mg''2''+. The influences of scanning potential ranges, scanning times to deposit MgHAp coatings were researched. The analytical results FTIR, SEM, X-ray, EDX, thickness and adhension strength showed that MgHAp coatings were single phase of HAp, fibrous shapes, thickness 8.1 μm and adhesion strength 7.20 MPa at the scanning potential ranges of 0 ∕ -1.7 V/SCE and scanning times of 5 scans. (author)

[en] MgB₄O₇:Dy is usually reported as having one dosimetric peak. Two sets of experimental studies followed by computer analysis of more than 200 glow curves indicate that a combination of at least 11 peaks of first order kinetics is necessary to describe the glow behaviour of MgB₄O₇:Dy. For a heating rate of 1^oC.s^-1, the maximum intensity of the individual peaks are situated at the following temperatures: 101, 110, 126, 142, 155, 160, 173, 192, 224, 231 and 304^oC. (author)