ISSN:
1551-2916
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Unit-cell parameters and the space group of a new phase of dicalcium silicate (Ca2SiO4) were determined by using powder X-ray diffractometry and selected-area electron diffraction techniques. This phase could be synthesized via the dissociation of hydrothermally synthesized alpha-Ca2(SiO4H)OH at temperatures of ∼500°-920°C. Crystallographic data for the sample synthesized at 600°C were as follows: Ca2SiO4, monoclinic; P21/c space group; lattice parameters of a= 0.82147(9) nm, b= 0.9808(1) nm, c= 0.9741(1) nm, and β= 94.642(7)°; cell volume (V) of 0.7857(1) nm3; Z= 8 (where Z is the number of chemical formula units in a unit cell); and a density of 2.91 g/cm3. The crystallographic data for samples synthesized at 800°C had slightly different unit-cell parameters of a= 0.82124(6) nm, b= 0.97348(7) nm, c= 0.97935(7) nm, β= 94.831(5)°, and V= 0.7849(1) nm3. Structural relationships of the new phase with the other dicalcium silicates are discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1151-2916.1998.tb02487.x
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