Ce4Ag3Ge4O(0.5)--chains of oxygen-centered [OCe2Ce(2/2)] tetrahedra embedded in a [CeAg3Ge4] intermetallic matrix.
The oxidation of an intermetallic phase under high-pressure/high-temperature conditions led to the synthesis of Ce4Ag3Ge4O(0.5) exhibiting [OCe2Ce(2/2] tetrahedral chains, in which the oxygen atoms statistically occupy the tetrahedral centres. Starting from a 1:1:1 CeAgGe precursor (NdPtSb type), a multianvil high-pressure/high-temperature experiment at 11.5 GPa and 1250-1300 °C revealed Ce4Ag3Ge4O(0.5), crystallizing in the space group Pnma with the following lattice parameters: a = 2087.3(4), b = 439.9(1), and c = 1113.8(2) pm. Magnetic measurements showed Curie-Weiss behavior above 100 K with an experimental magnetic moment of 2.42 µB per Ce atom, close to the value for the free Ce(3+) ion, clearly indicating trivalent cerium in Ce4Ag3Ge4O(0.5). Full potential GGA+U band structure calculations resulted in metallic properties and a magnetic ground state with one unpaired 4f-electron per cerium in agreement with the experiments.
Dimensionality of the oxidic layers in pnictide oxides and transition metal p‐element ordering in tetrelides and pnictides
Pnictide oxides exhibit a rich crystal chemistry, which is much more than the ZrCuSiAs structure of LaFeAsO, the mother‐structure of the 1‐1‐1‐1 materials. The present micro‐review focuses on different dimensionalities in the oxidic and the pnictide substructures, largely extending the structural building units. The second part concerns BaAl4/ThCr2Si2 superstructures, which extend the crystal chemistry of BaFe2As2. Key parameters for superstructure formation are either an ordering of the transition metal and p‐element atoms (coloring) or an ordering of vacancies.
Managerial Economics and Organizational Architecture
PART 1: Basic Concepts Chapter 1: Introduction Chapter 2: Economists' View of Behavior Chapter 3: Markets, Organizations, and the Role of Knowledge PART 2: Managerial Economics Chapter 4: Demand Chapter 5: Production and Cost Chapter 6: Market Structure Chapter 7: Pricing with Market Power Chapter 8: Economics of Strategy: Creating and Capturing Value Chapter 9: Economics of Strategy: Game Theory Chapter 10: Incentive Conflicts and Contracts PART 3: Designing Organizational Architecture Chapter 11: Organizational Architecture Chapter 12: Decision Rights: The Level of Empowerment Chapter 13: Decision Rights: Bundling Tasks into Jobs and Subunits Chapter 14: Attracting and Retaining Qualified Employees Chapter 15: Incentive Compensation Chapter 16: Individual Performance Evaluation Chapter 17: Divisional Performance Evaluation Capstone Case Study on Organizational Architecture: Arthur Andersen LLP PART 4: Applications of Organizational Architecture Chapter 18: Corporate Governance Chapter 19: Vertical Integration and Outsourcing Chapter 20: Leadership: Motivating Change within Organizations Chapter 21: Understanding the Business Environment: The Economics of Regulation Chapter 22: Ethics and Organizational Architecture Chapter 23: Organizational Architecture and the Process of Management Innovation Glossary Index