" /> " /> " /> " /> " /> " /> and Pn21a. All atom sites in Pn21a were within 3σ from those in Pnma, except for and Pn21a. All atom sites in Pn21a were within 3σ from those in Pnma, except for and Pn21a. All atom sites in Pn21a were within 3σ from those in Pnma, except for and Pn21a. All atom sites in Pn21a were within 3σ from those in Pnma, except for and Pn21a. All atom sites in Pn21a were within 3σ from those in Pnma, except for and Pn21a. All atom sites in Pn21a were within 3σ from those in Pnma, except for three Al positions, which were within 6σ. The space group Pnma was found to be correct. three Al positions, which were within 6σ. The space group Pnma was found to be correct. three Al positions, which were within 6σ. The space group Pnma was found to be correct. three Al positions, which were within 6σ. The space group Pnma was found to be correct. three Al positions, which were within 6σ. The space group Pnma was found to be correct. three Al positions, which were within 6σ. The space group Pnma was found to be correct.