Abstract
We present new detailed structural data versus temperature on the Nasicon structured material NbTi(PO4)(3) obtained from powder neutron diffraction studies. This material shows a significant volume contraction over the range 20 degrees C < T < 700 degrees C. alpha(a) varies between -4.34 and -0.11 x 10(-6)degrees C-1 and alpha(c) between 0.08 and 3.07 x 10(-6)degrees C-1 over this range. This behaviour contrasts with the case of NaTi2(PO4)(3) (NaTP) which shows a positive volume expansion. The difference in this behaviour can be explained by the presence of filled MI sites in NaTP which are vacant in the case of NbTP.
Original language | English |
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Number of pages | 191 |
Volume | 547 |
Publication status | Published - 1999 |