Lorentz and Polarization Correction for the Buerger Precession Method

In a previous publication it was shown that in the precession method the angular velocity with which the reciprocal lattice moves through the sphere of reflection is not constant and equal to the angular velocity of precession, but rather varies with the position of the precession axis, It attains its maximum or minimum value whenever this axis passes, respectively, through a vertical or a horizontal plane

The Absolute Configuration of d-Tartaric Acid

The crystal structure of d-tartaric acid published recently by Beevers and Stern makes possible an absolute determination of the structural configuration of the d-tartaric acid molecule. This is all the more important, as an assignment of absolute configuration to a molecule related to tartaric acid and therefore to a whole class of optically active molecules on the basis of a physical theory of optical activity, seems to be open to criticism

The Lorentz Factor for the Buerger Precession Method

The Lorentz factor for the Buerger precession method is derived. It turns out that the angular velocity of the motion of the reciprocal lattice through the sphere of reflection is not uniform as hitherto accepted. The Lorentz factor thus depends explicitly on all three cylindrical coordinates ξ, ζ, τ of the reciprocal lattice point under consideration and not on only as ξ and ζ

The Lorentz Factor for the Buerger Precession Method

The Lorentz factor for the Buerger precession method is derived. It turns out that the angular velocity of the motion of the reciprocal lattice through the sphere of reflection is not uniform as hitherto accepted. The Lorentz factor thus depends explicitly on all three cylindrical coordinates ξ, ζ, τ of the reciprocal lattice point under consideration and not on only as ξ and ζ

Lorentz and Polarization Correction for the Buerger Precession Method

In a previous publication it was shown that in the precession method the angular velocity with which the reciprocal lattice moves through the sphere of reflection is not constant and equal to the angular velocity of precession, but rather varies with the position of the precession axis, It attains its maximum or minimum value whenever this axis passes, respectively, through a vertical or a horizontal plane

The Absolute Configuration of d-Tartaric Acid

The crystal structure of d-tartaric acid published recently by Beevers and Stern makes possible an absolute determination of the structural configuration of the d-tartaric acid molecule. This is all the more important, as an assignment of absolute configuration to a molecule related to tartaric acid and therefore to a whole class of optically active molecules on the basis of a physical theory of optical activity, seems to be open to criticism

The Crystal Structure of NaPt_3O_4

The structure of a microcrystalline platinum compound is derived from x‐ray data. Space group O h 3—Pm3n, a_0 = 5.69A, with 6 Pt at ±(¼ 0 ½, ↺), 8 O at ±(¼ ¼ ¼, ¼ ¾ ¾, ↺), and 2 Na at (000, ½ ½ ½), corresponding to the formula NaPt_3O_4. The coordinations are as follows: platinum 4 O and 2 Pt, oxygen: 3 O and 2 Na,sodium: 8 O. The substance is an ionic conductor

The Structure of Na_xPt_3O_4

In the preceding note Galloni and Busch report the results of a spectroscopic analysis of a platinum oxide similar to the compound recently investigated by us. While their compound apparently did not contain significant amounts of sodium, we had assigned the formula NaPt_3O_4 to our preparation

The Structure of Na_xPt_3O_4

In the preceding note Galloni and Busch report the results of a spectroscopic analysis of a platinum oxide similar to the compound recently investigated by us. While their compound apparently did not contain significant amounts of sodium, we had assigned the formula NaPt_3O_4 to our preparation

The Crystal Structure of NaPt_3O_4

The structure of a microcrystalline platinum compound is derived from x‐ray data. Space group O h 3—Pm3n, a_0 = 5.69A, with 6 Pt at ±(¼ 0 ½, ↺), 8 O at ±(¼ ¼ ¼, ¼ ¾ ¾, ↺), and 2 Na at (000, ½ ½ ½), corresponding to the formula NaPt_3O_4. The coordinations are as follows: platinum 4 O and 2 Pt, oxygen: 3 O and 2 Na,sodium: 8 O. The substance is an ionic conductor