Vapor pressure 9.9 x 10-18 mm Hg. 23. 24 KI crystallizes in the sodium chloride structure, hexahedral crystals. It is less hygroscopic than sodium. 25 iodide, making it easier to work with. Potassium iodide is stable in dry air but slightly hygroscopic in. 26 moist air.
Earlier this year China opened the Quindao Haiwan Bridge, the world's longest bridge over water stretching 26.4 miles. With the opening of the Quindao Haiwan, Louisiana's Lake Pontchartrain Bridge fell to second longest after holding the top spot since it opened in 1956. Click here to see the bridges > Â».
Tianjin Grand Bridge is a railway viaduct bridge that runs between Langfang and Qingxian, part of the BeijingâShanghai High-Speed Railway. It is one of the longest bridges in the world with a total length of about 113,700 m (373,000 ft), or 113.7 kilometres (70.6 mi).