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Journal ArticleDOI

Heat-Sensitive Color Changes in Some Inorganic Chemicals

01 Oct 1951-American Journal of Physics (American Association of Physics Teachers)-Vol. 19, Iss: 7, pp 424-425
About: This article is published in American Journal of Physics.The article was published on 1951-10-01. It has received 7 citations till now. The article focuses on the topics: Inorganic Chemical.
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Journal ArticleDOI
TL;DR: In this paper, four high pressure phases of silver mercury iodide, Ag 2 HgI 4, were studied to pressures of 75-100 kbar at 25°C.

26 citations

Journal ArticleDOI
TL;DR: In this article, the electrical conductivity and differential thermal analysis (DTA) curves of MnHgI4 complexes (M = Ag1+, Cu1+, Hg22+, Tl1+ and Pb2+) and HgI2 and AgI are reported.

16 citations

Journal ArticleDOI
Edward A. Heintz1
TL;DR: In this article, the thermal decomposition of tetraiodomercurates of copper, silver, lead, mercury, thallium, and lead was studied on the thermal balance up to 1350°C.

15 citations

Journal ArticleDOI
TL;DR: In this article, the thermochromic behavior of Cu2[HgI4], Ag2[AgI4, Tl2[Tl2] HgI 4], Pb[HGI4] and Hg [Hg I4] was investigated by the techniques of HTRS and DRS.

8 citations

Journal ArticleDOI
TL;DR: In this paper, the spinel-related iodides A2HgI4, (A = Ag, Cu, Tl and 1/2Pb) at high pressures in a diamond anvil cell were reported.
Abstract: Raman spectra and phonon pressure dependencies are reported for the spinel-related iodides A2HgI4, (A = Ag, Cu, Tl and 1/2Pb) at high pressures in a diamond anvil cell. In each case the upper pressure limit of observation was set by changes in band gap which caused darkening and photodecomposition. New phase transitions were found for Cu2HgI4 (8 and 25 kbar), Tl2HgI4 (11.5 kbar) and PbHgI4 (7 and 14 kbar). Transitions in Ag2HgI4 were located at 3.3, 5.9 and 8.1 kbar, confirming and extending earlier evidence. The β-Ag2HgI4 to phase II transition at 3.3 kbar appears to be second-order in type. Using Landau's theory, Ag2HgI4 II was shown to adopt space group C. Similarly, at the I/II transition in Cu2HgI4, the new phase (II) can have either D or C symmetry.

8 citations