Strontium arsenide

Strontium Arsenide, Sr3As2, may be prepared by reduction of strontium arsenate. This is best accomplished by rapidly heating with carbon 10 to 1500° to 1600° C. If the heating is slow, reduction begins at about 800° C-. yielding first the arsenite, arsenic then being lost and strontium oxide formed. Calcium arsenate behaves similarly (p. 60). Strontium arsenide forms reddish-brown crystals, transparent in thin... 

Barium Arsenide, Ba3As2.—By passing arsine over barium oxide at red heat Soubeiran 4 obtained a mixture of arsenide and arsenite. Lebeau 6 prepared the pure arsenide by reduction of barium arsenate with carbon in an electric furnace. Barium arsenide is very similar in properties to the arsenides of calcium and strontium it is slightly darker in colour, more readily fusible and more reactive chemically. Its density at 15° C. is 4-1. It burns spontaneously in fluorine, chlorine or bromine vapour. In oxygen it burns at about 300° C. and in sulphur vapour at dull red heat. 

Phosphorus pentafluoride Polarine oil Selenium mustard Silicon tetrafluoride Strontium chlorate Strontium permanganate Sulfur chloropentafluoride Sulfur dichloride Sulfur hexafluoride Sulfur monochloride Titanium tetrachloride Thiocarhonyl dichloride Thionyl fluoride Thioptiosgene Triethyl aluminum Trifluoromethyl iodide Triisohutylaluminum Trimethylaluminum Vanadium tetrachloride Vincennite Vinyl bromide Vinylmagnesium bromide Xenon difluoride Zinc arsenide... 

The material composition of the FPAs determines the detectable IR-spectral frequency range. Many types of detectors are available, ranging from the commonly used indium antimonide (InSb) for near IR and mercury cadmium telluride (HgCdTe, MCT) for the mid IR to the more exotic silicon arsenide (Si As) [10] and uncooled barium strontium titanium (BST) [11]. Mid-IR imaging using MCT FPAs [12] has been the most popular in terms of the number of studies performed, due to its ability to provide access to the molecular-fingerprint region. 

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