Orthorhombic, Point Group 222 02 Materials

Table ft.tr-18 Orthorhombic, point group mmm (D2h) materials, cont. 

Table l. k-20 Orthorhombic, point group mm2 (C211) materials, conL... 

The white crystalline solid has no clear melting point. Decomposition begins at approximately 170°, but sublimation may be accomplished at 190° under reduced pressure with some loss of material. It is soluble in ethers and slightly so in aromatic hydrocarbons. The substance rapidly decomposes with the slightest exposure to either HeO or Oe- Diindenylmagnesium crystallizes in the orthorhombic space group P2i2i2i with lattice Constantsa = 21.494(9), b = 12.375(5), c = 10.394(4) A, and pcaicd = 1.23 cm 3 for 8 molecules per unit cell. 

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