作者: 連系 時間: 2025-3-21 22:01
R. E. Maerker,B. L. Broadhead,M. L. Williamsrt substance should be at the same temperature during heating as long as there is no reaction in the sample. Such is the case with a small sample and an inert reference material that does not differ greatly from the sample chemically (e.g., with silicate samples, burnt kaolinite should be used as the inert substance).作者: fabricate 時間: 2025-3-22 02:11
https://doi.org/10.1007/978-3-642-65951-5Differentialthermoanalyse; Mineralogie; X-ray; atmosphere; classification; formation; mineral; mineralogy; r作者: 不滿分子 時間: 2025-3-22 08:00 作者: 疏忽 時間: 2025-3-22 11:29 作者: Painstaking 時間: 2025-3-22 16:23
Minerals, Rocks and Mountainshttp://image.papertrans.cn/d/image/278799.jpg作者: Painstaking 時間: 2025-3-22 19:42
Pressure Vessel Dosimetry at U.S. PWR Plantsl or other chemical substance during thermal treatment (heating or cooling), the weight and energy changes can be identified and measured very clearly. Weight loss which for example occurs during dehydration or loss of CO., SO. etc., can be determined with a thermobalance, recorded, and graphed vers作者: 表示向前 時間: 2025-3-23 00:10
R. E. Maerker,B. L. Broadhead,M. L. Williamsrt substance should be at the same temperature during heating as long as there is no reaction in the sample. Such is the case with a small sample and an inert reference material that does not differ greatly from the sample chemically (e.g., with silicate samples, burnt kaolinite should be used as th作者: 滲透 時間: 2025-3-23 04:02 作者: Tortuous 時間: 2025-3-23 09:14
Identities Welcome and Unwelcome in College,ty of a mineral in the heated sample being responsible for this effect. ., . and . and . have compared the appearence and the temperature of dehydration reactions of unknown clay samples with those of well-known samples. So they received approximate data about the portions of clay minerals in these 作者: GREG 時間: 2025-3-23 10:31 作者: Notorious 時間: 2025-3-23 16:03 作者: 業(yè)余愛好者 時間: 2025-3-23 21:05
Pelusa Orellana García,Paula Baldwin Lindyolite and fluorite show minor endothermic effects caused by structural changes (see Fig. 10). The cryolite is a suitable internal standard for the determination of the high-low inversion temperatures of quartz crystals (see III-8), because of its reversible structural transformation temperature of 作者: Presbyopia 時間: 2025-3-23 22:41
Reading as a Social Practice: Race Talk,f quartz (~573° C) has been for many years a means of calibrating the temperature, as well as for calorimetric measurements (following a proposal of .), but neither the inversion temperature (= .) nor the heat of reaction (3.1 cal/g after .) can be used for calibration, since the . can vary by a gre作者: tolerance 時間: 2025-3-24 06:02 作者: MIME 時間: 2025-3-24 09:33 作者: Exhilarate 時間: 2025-3-24 13:41
Steven R. Yussen,Randall L. Glysche minerals lawsonite, hemimorphite, dioptase, chrysocolla). Generally silicate structures are very stable. So even the dehydration of OH . -containing silicates (with the exception of the sheet silicates) will take place at very high temperatures. This was demonstrated by . when he described the deh作者: Dorsal-Kyphosis 時間: 2025-3-24 18:32
The Spelling-Sound Code in Readingygens to a plane network, and of octahedral (Al,Mg)(OH).- layers, with water and various cations between the different packets. They are generally very fine-grained (<2 μ?) and are the “classical terrain” for differential thermal analysis. These silicate minerals occurring in soils and sediments or 作者: 分開 時間: 2025-3-24 19:40
https://doi.org/10.1057/9780230610286sformation from high- to low-temperature plagioclases between 780 and 820° C being a weak endothermic effect; in the author’s DTA runs up to 1000° C, no thermal effects could be detected. . are alumosilicates built up to a bulky framework with hollow channels in the structure which can be filled up 作者: 怒目而視 時間: 2025-3-25 01:00
https://doi.org/10.1057/9780230610286), in which allophanes will be quickly transformed in nature by ageing and ordering (. et al.). The endothermic dehydration peak between 130 and 185° C shifts a little towards higher temperatures with decreasing particle size (. et al.): the larger surface of finer particles is able to adsorb more w作者: hardheaded 時間: 2025-3-25 04:08
Reading Books and Prints as Cultural Objects index versus double refraction. With the aid of this diagram a mineral can be searched for, of which the optical characteristics are known by measurements. In differential thermal analysis it will be much more difficult than in optics to develop a similar introductory diagram. But on principle it i作者: 人類 時間: 2025-3-25 07:34 作者: justify 時間: 2025-3-25 13:07
https://doi.org/10.1007/978-3-319-53832-7variations of the chemical composition, e.g. to the Ba-, Sr- or Pb-contents of these aragonites, in the case of . structural transformations (inversions), this relation can be observed. So witherite, BaCO., shows two minor but clearly observable endothermic effects at 811 ± 2° C and 981 ± 1° C due t作者: 圓錐體 時間: 2025-3-25 18:43 作者: 細頸瓶 時間: 2025-3-25 20:53
J. M. Coetzee and the Woman Question,their chemical composition (see . in .-.: proposals to the classification of chlorites from ., ., ., ., ., . a.o.). . distinguished the minerals of the four main subgroups Mg-chlorites (optical positive, normal interference colours), Mg-Fe-chlorites: (optical positive, anomal brown interference colo作者: 膽小鬼 時間: 2025-3-26 03:03
Quantitative Determinations by DTAents (., . and .). Meanwhile only the . of a deflection in the DTA curve is regarded as a measure for the amount of a reacting substance during the heating process (. and .; . and .; . and .; . et al.; ., . et al. and others).作者: Strength 時間: 2025-3-26 04:38 作者: BUDGE 時間: 2025-3-26 10:49 作者: 討人喜歡 時間: 2025-3-26 13:32
Ortho-, Ring-, and Chain Silicatestransformation behaviour of some pyroxenes. . published the data of the mineral ilvaite, and garnets can also be investigated by means of DTA if they contain some (OH) instead of (SiO.); e.g. see . and ., who reported on the data of hydrogrossular. Thermogravimetric investigations of . and of . (196作者: ureter 時間: 2025-3-26 19:21 作者: 招人嫉妒 時間: 2025-3-26 21:56 作者: 一回合 時間: 2025-3-27 03:23
Development of Identification Diagrams all runs have been made under comparable heating conditions. The following consequence is: such an introductory diagram temperature versus . of a peak can be only valid for one set of investigation conditions. If you vary the heating rate, for example, you will get a shifting of the data. Therefore作者: PANG 時間: 2025-3-27 08:11
Influence of the Chemical Composition on the Decomposition Temperatures of Carbonates and Hydroxidespure crystal, the DTA curve of the same mineral that is impure or disordered only shows a broad deflection of lower intensity without a distinct endothermic minimum. The . (.) of a decomposition peak therefore indicates if substitutions or crystal physical defects are present or absent in a crystal 作者: 網(wǎng)絡(luò)添麻煩 時間: 2025-3-27 11:38 作者: 充足 時間: 2025-3-27 16:04
Identities Welcome and Unwelcome in College,ents (., . and .). Meanwhile only the . of a deflection in the DTA curve is regarded as a measure for the amount of a reacting substance during the heating process (. and .; . and .; . and .; . et al.; ., . et al. and others).作者: 沐浴 時間: 2025-3-27 20:06 作者: 痛恨 時間: 2025-3-28 00:26
Reading as a Social Practice: Race Talk,ts with peaks at 380 and 580° C. Shape and temperatures of these peaks are dependent on the grain size (.), and on some other factors (.). A weak endothermic effect at 680° C points out the Curie point of Fe.O. (.); the temperature of this peak varies with different contents of titanium and manganes作者: 火海 時間: 2025-3-28 04:28
Steven R. Yussen,Randall L. Glyschtransformation behaviour of some pyroxenes. . published the data of the mineral ilvaite, and garnets can also be investigated by means of DTA if they contain some (OH) instead of (SiO.); e.g. see . and ., who reported on the data of hydrogrossular. Thermogravimetric investigations of . and of . (196作者: dictator 時間: 2025-3-28 07:40
The Spelling-Sound Code in Readinglty results from disorder of the structure which lowers the thermal effects, from differences in grain or particle size, from strongly varying chemical compositions of the minerals and from the fact that sheet silicate minerals scarcely occur in a pure form. However, they only occur in mixtures of s作者: neologism 時間: 2025-3-28 11:06 作者: 擋泥板 時間: 2025-3-28 15:33
Reading Books and Prints as Cultural Objects all runs have been made under comparable heating conditions. The following consequence is: such an introductory diagram temperature versus . of a peak can be only valid for one set of investigation conditions. If you vary the heating rate, for example, you will get a shifting of the data. Therefore作者: 有法律效應(yīng) 時間: 2025-3-28 22:21
Reading Books and Prints as Cultural Objectspure crystal, the DTA curve of the same mineral that is impure or disordered only shows a broad deflection of lower intensity without a distinct endothermic minimum. The . (.) of a decomposition peak therefore indicates if substitutions or crystal physical defects are present or absent in a crystal 作者: 中止 時間: 2025-3-28 22:57 作者: 清洗 時間: 2025-3-29 03:13
Book 1974ations of thermogravimetry and DT A have been described in detail by LEHMANN, DAS and PAETSCH (1953), R. C. MACKENZIE (1957, 1970), DUVAL (1963), WENDLANDT (1964), GARN (1965), F. PAULIK et al. (1966), SMOTHERS and CHIANG (1966), and KEATTCH (1969). Thermoanalytical results are strongly influenced b作者: 柏樹 時間: 2025-3-29 09:16
0343-2181 963), WENDLANDT (1964), GARN (1965), F. PAULIK et al. (1966), SMOTHERS and CHIANG (1966), and KEATTCH (1969). Thermoanalytical results are strongly influenced b978-3-642-65953-9978-3-642-65951-5Series ISSN 0343-2181 作者: Militia 時間: 2025-3-29 13:00 作者: Aids209 時間: 2025-3-29 19:26 作者: Malaise 時間: 2025-3-29 22:55 作者: 愛了嗎 時間: 2025-3-30 02:47
Influence of the Chemical Composition on the Temperatures of Structural Transformationsormation temperature of this witherite containing Ca and Mg and of norsethite demonstrate that this second transformation temperature is apparently being influenced by the Mg contents incorporated into the witherite resp. norsethite structure.作者: START 時間: 2025-3-30 05:01
Contribution to the Classification of Chloriteslorites will not be successful to the same extent as in optical investigations of other mineral groups-, “in spite of the optimistical estimation of some authors” (.). Therefore as a method additional to optics . recommends “the differential thermal analysis and the possibilities of classification latent in this method”.作者: Strength 時間: 2025-3-30 09:49 作者: affinity 時間: 2025-3-30 12:38 作者: 使熄滅 時間: 2025-3-30 19:59 作者: gastritis 時間: 2025-3-30 23:35 作者: 主講人 時間: 2025-3-31 01:17
Methods Combined with DTAatus consists of an X-ray apparatus with a sample holder suitable for high-temperatures, which serves simultaneously as a DTA furnace combined with the remaining parts of a DTA apparatus. The method of . makes it possible to identify reaction products with a short existence that are only stable over a small range of temperature.作者: 較早 時間: 2025-3-31 09:02
Zeolitesed. Most of the zeolites lose their water below 400° C (see Table 25). Only laumontite, chabasite and the minerals of the natrolite group (natrolite, scolezite, thomsonite) dehydrate partly between 400 and 600° C, so demonstrating that a part of the water has been structurally bound more effectively than the water of the channels.作者: Crumple 時間: 2025-3-31 11:03 作者: KIN 時間: 2025-3-31 13:31 作者: Ceremony 時間: 2025-3-31 19:56
Borates, Phosphates, and Arsenates dehydration in several steps between 90 and 580° C. Endothermic effects between 600 and 780° C reflect melting of the substances, exothermic effects between 600 and 800° C the reformation of a crystal structure (see Table Hand Fig.28).作者: saphenous-vein 時間: 2025-4-1 00:40 作者: 相同 時間: 2025-4-1 03:14
0343-2181 lytical methods have been in use for some time, as shown by the more than five thousand publications containing DT A or TG curves listed by SMOTHERS and CHIANG in the bibliography to their handbook and abstracted in the several volumes of Thermal Analysis Abstracts (TAA), edited by J. P. REDFERN for作者: Exterior 時間: 2025-4-1 06:48
https://doi.org/10.1007/978-94-010-9726-0some substances and their transformation data suitable for calibration of a DTA apparatus following the intentions of .-., . and . ., and .-. (1967 b). The determination of . (e.g., those of metals, see . and . .) has to be made in graphite crucibles with thermocouples lying directly below the crucibles.作者: Measured 時間: 2025-4-1 13:16
The Spelling-Sound Code in Readingeral minerals (e.g. cerussite: . and .; huntite: ., 1953; hydromagnesite: ., 1943a,b; carletonite: .; manasseite: . and . etc.), above all the Ca-Mg-Fe-Mn carbonates have been studied over and over again, since the analysis of these minerals involves a lot of problems reflected in major differences of their DTA curves.
