Cyclic biomimetic mineralization has formed simple Ca-P compounds in monoclinic
crystal structure (Fig.
The tetragonal to monoclinic
transformation (tm) is associated with a substantial volume increase (~4.
The tested hypotheses are that: (1) the grinding of zirconia with larger grit-size devices leads to a decrease in flexural strength and to an increase in monoclinic
content and in surface roughness; and (2) heat treatment restores the original characteristics of the material.
The important point in this process is the production of tetragonal and cubic zirconia nanoparticles from the initial monoclinic
It then succeeded in developing a new type of zirconia that has both higher flexural strength and fracture toughness and, when exposed to hydrothermal condition, its crystal structure does not change to a monoclinic
phase, a common cause of compromised strength.
The XRD and FT-IR indicate the existence of kaolinite poorly ordered, monoclinic
, mixed with others mineral, such as halloysite, dickite, nacrite, quartz, illite, feldspars.
It consists of cubic zirconia as the major phase and monoclinic
and tetragonal zirconia precip- itates as the minor phase.
The findings revealed that the ceramic can suffer a slow, tetragonal to monoclinic
phase transformation at the samples surface in a humid atmosphere, followed by microcracking and a major loss in strength known as low temperature degradation (LTD) [6-10].
A Redetermination of the structures of bis(salicylideneaminato)nickel(II) and monoclinic
and orthorhombic forms of bis(N- methylsalicylideneaminato) nickel(II), Acta Crystallogr.
2,3) The most common crystal form is the alpha, or monoclinic
form, which melts at about 165[degrees]C for Ziegler-Natta polymerized homopolymer.
The thermal decomposition and the XRD patterns showed that the crystallization of the monoclinic
sodium titanate phase occurred at 700[degree]C.
In a similar vein, Marsh (11) demonstrates that many structures initially described in monoclinic
space group Cc are "better described in higher symmetries.