摘要:

AbstractThe orthosilicates of barium, strontium, calcium, and magnesium; mixed orthosilicates; and mixtures of the orthosilicates of the alkaline earth group are discussed. The effect of periclase on these types of orthosilicates at high temperatures is described. Tabulations are given of the physical properties and chemical compositions of the orthosilicates, including their chemical and mineralogical names, melting points, decomposition points, molecular weights, chemical compositions, crystalline systems, indices of refraction, optical signs, specific gravities, and specific volumes. New data and many illustrations are submitted to show the range of critical temperatures at which reactions take place and at which stabilization is effective. The order of formation is discussed in detail with special reference to the effect of the composition of the starting materials on the rate of reaction and on the critical temperatures at which the orthosilicates are formed.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1941.tb14447.x

出版商:Blackwell Publishing Ltd    

年代:1941

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1941.tb14448.x

出版商:Blackwell Publishing Ltd    

年代:1941

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1941.tb14449.x

出版商:Blackwell Publishing Ltd    

年代:1941

数据来源: WILEY

摘要:

AbstractCoal Measures shales, which are widespread in Illinois, are used extensively as a ceramic raw material. Ceramic determinations are given for a large number of shales to illustrate the wide range in their properties. The mineral composition, base‐exchange capacity, and textural characteristics are presented for the same shales, and the relation of these characteristics to the ceramic properties of the shales is analyze

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1941.tb14450.x

出版商:Blackwell Publishing Ltd    

年代:1941

数据来源: WILEY

摘要:

AbstractThe effects of storage of solutions in glass bottles at room temperature are compared with the results of various accelerated tests with corresponding solutions in the first paper of this series. The acid tests at room temperature are in good agreement with those at higher temperatures.Relative resistances of glass bottles as shown by accelerated tests with waterroughlyparallel relative resistances appearing in room‐temperature storage of unbuffered, neutral materialsonlyif the various amounts of extraction are approximately the same at both temperatures.The tendency of bottles to produce flakes or insoluble matter in alkaline solutions bears no direct relation to the amount of soluble matter extracted by such solution

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1941.tb14451.x

出版商:Blackwell Publishing Ltd    

年代:1941

数据来源: WILEY