The icosahedral phase is directly transformed into the [lambda]-[Al.sub.13][Fe.sub.4] monoclinic
The occurrence of a monoclinic
packing and interactions between the slight remaining hydrogen-bonding parts was suggested from a reciprocal lattice analysis.
Z 4 Peak-shape profile Crystal system monoclinic
[R.sub.p] (%) Space group Cc (No 9) [R.sub.wp] (%) [D.sub.calc] 7.15 [R.sub.exp] (%) (g/[cm.sup.-3]) Temperature (K) 295 S Molecular formula Siemens D5005 Molecular weight 1.54056 Cu[K.sub.[alfa]] (g/mol) a ([angstrom]) 10-120 b ([angstrom]) 0.02 c ([angstrom]) 45 [beta] ([grados]) 5501 V ([angstrom]3) 290 Z Pseudo-Voigt Crystal system 8.1 Space group 9.6 [D.sub.calc] 7.1 (g/[cm.sup.-3]) Temperature (K) 1.4 Table 2 Atomic coordinates, isotropic temperature factors and geometric parameters ([angstrom],[grados]) for [Ag.sub.2Sn[Te.sub.3] Atom Ox.
The present work focuses on the following crystalline phases at room temperature and below: the rhombohedral FE N phase (R3c, SG 161, Z = 6), the monoclinic
AFE P phase (Pm, SG 6, Z = 8), and the orthorhombic AFE P phase (Pbcm, SG 57, Z = 8).
phase fraction ([X.sub.m]) was calculated according to the method described by Garvie and Nicholson :
The torsional rigidity of the monoclinic
, piezoelectric cylinder is denoted by K and it can be computed as [9,10]
Similarly, pure monoclinic
zirconia was also checked for its catalytic activity with optimal reaction conditions (catalyst: 0.1 g, time: 6 hrs, temperature: 353 K, flow of oxygen: 40 mL/min, p[O.sub.2]: 760 torr, and cyclohexanol: 10 mL).
[beta]-Quinacridone (ER-02), as it was shown by DSC study, acted as a strong nucleating agent and promoted crystallization of iPP in monoclinic
[Li.sub.3][V.sub.2][(P[O.sub.4]).sub.3]/C nanocrystals comodified with graphene nanosheets and carbon nanotubes as a three-dimensional-network cathode material for rechargeable lithium-ion batteries," RSC Advances, vol.
The Raman bands in this spectrum can be attributed either to monoclinic
or to hexagonal [La.sub.2][O.sub.2][CO.sup.3], which are commonly observed La oxycarbonate crystal phases and are generally marked as phase (Ia) and phase (II), respectively.
Zirconium crystals undergo crystallographic changes ranging from the melting temperature (4919 [degrees]F) to room temperature; these changes are: monoclinic
phase (room temperature-2138[degrees]F), tetragonal phase (2138-4298[degrees]F), and cubic phase (over 4298[degrees]F).
The remarkable mechanical properties of zirconia, already exploited in several medical and engineering applications, are mainly due to the tetragonal to monoclinic
(tm) phase transformation.