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).
The real (green) and imaginary (orange) parts of the dielectric function calculated using the PBEsol functional (solid lines) are shown in Figure 6(b) for the orthorhombic Pbcm phase.
Similar to the orthorhombic Pbcm phase, the conventional PBE functional overestimates the unit-cell volume the most, whereas the AM05 and PBEsol functionals again only slightly overestimate, with the PBEsol functional performing best for the structural properties.
Due to the smaller amount of atoms in the unit cell, Z = 6 for the rhombohedral R3c phase compared to Z = 8 for the orthorhombic Pbcm and the monoclinic Pm phases, there are fewer bands in the electronic band structure.
Broad ranges of nearly parallel bands in the electronic band structure (Figure 5(a)) give rise to slightly narrower but still very broad absorption peaks compared to the orthorhombic Pbcm and the monoclinic Pm phases, now centred at slightly smaller energies.
Phase III: orthorhombic Pbcm. Phase IV: monoclinic Pm phase.
The secondary research question was "Does PBCM contribute to the prevention of child behavioral problems compared to the control group?"
As parenting is an important determinant of child behavioral problems (Rothbaum & Weisz, 1994) and the proximal goal of PBCM is to improve parenting, the distal objective is to prevent behavioral problems in children.
The study was a randomized controlled clinical trial comparing parenting and child behavioral problems of participants of PBCM and a control group at baseline and at 9 and 18 months of follow-up.
Inclusion criteria were: parent is being treated for psychiatric disorder and is the caregiver of a child aged between 3 and 10 years; (both) parents are interested in PBCM; the family is exposed to three or more of a list of 16 risk factors for poor parenting (single parenthood; little support from spouse; little network support; relational problems; partner with psychological problems; children with poor health/handicaps/difficult temperament; changes in family structure/ housing; two or more life events in the past 2 years; housing problems; poverty or debts; having been abused as a child; severe psychiatric symptoms; low compliance with psychiatric treatment; impulse control problems; alcohol or drugs problems; low intelligence).
The PBCM program aims to improve parenting by organizing and coordinating psychiatric and preventive services for families, tailored to their assessed needs.
In the second step, the re searcher contacted 256 eligible and interested families and checked whether both parents were interested in PBCM, and checked all in- and exclusion criteria.