The Crystal Structure of alpha-Sr2P2O7.

Hydrothermal Synthesis, Structural Characterization, and Physical Properties of a New Mixed Valence Iron Phosphate, SrFe3(PO4)3

“…The second and third reactions were undertaken using the identical heating procedure but with mixtures of SrCO , FeO, and (NH ) HPO (molar ratio 1 : 3 : 3) and SrO, FeO, and (NH ) HPO (molar ratio 1 : 3 : 3). All three reactions led to a pale orange and white biphasic mixture of Fe (PO ) (14) and Sr P O (15), respectively, as determined by X-ray powder di!raction. It is not surprising that synthesis by high-temperature ceramic methods leads to exclusively Fe(II) products, but it does indicate that the title compound cannot be prepared over a wide range of conditions.…”

Blue emission of Sr2−xCaxP2O7:Eu2+ for near UV excitation

“…␣-Sr 2 P 2 O 7 has an orthorhombic unit cell with space group Pnma. There are two types of Sr 2+ sites which are both coordinated by nine oxygens [11,12]. ␣-Ca 2 P 2 O 7 crystallizes in the monoclinic space group P2 1 /n.…”

Luminescence of Ce3+ at two different sites in α-Sr2P2O7 under vacuum ultraviolet-UV and x-ray excitation

“…The low-temperature ␤-phase is tetragonal, while the high-temperature ␣-phase is orthorhombic. [13][14][15] The high-temperature modification has the centrosymmetric Pnam space group. The XRD patterns of the powder samples ␣-Sr 2−2x Ce x Na x P 2 O 7 ͑x = 0.005, 0.01, 0.02, 0.03, 0.04, 0.05͒ were measured at RT, and as examples three diffractograms for the samples with x = 0.005, 0.03, 0.05 are shown in Fig.…”