Twinning and disorder in zinc perchlorate hexahydrate crystals
Abstract
The crystal structure of zinc Perchlorate hexahydrate resembles that of lithium Perchlorate trihydrate (space group: P63mc) as far as the perchlorate-water arrangement is concerned. The distribution of zinc atoms among twice their number of available sites gives rise to orthorhombic symmetry (space group: Pmn21), and crystals of this salt grow as three-component twins, in which the perchlorate-water arrangement is continuous throughout a crystal, discontinuity at the twin boundaries being only in the distribution of zinc atoms. Moreover, in the odd-layer Weissenberg photographs from rotation about the c axis, certain spots containing contributions from zinc atoms only streak out to form a hexagonal network. This observation has been explained in terms of mistakes in repetition along the b axis of the orthorhombic cell of each of the three twin components; the probability of such mistake has been estimated quantitatively from the intensity distribution of a suitable diffuse streak.
Artikel in diesem Heft
- Zeitschrift für Kristallographie 1877–1977
- The Zeitschrift für Kristallographie and Professor Dr. G. Menzer
- Die Molekular- und Kristallstruktur von N,N′-Disalicyliden-meso-1,2-diphenyläthylendiamin*
- Quadratischer elektrooptischer Tensor des rhombischen Calciumformiats
- Die Kristallstruktur von Cu2As3O6CH3COO
- Die Bestimmung der Kristallstruktur von Trimerit CaMn2(BeSiO4)3 und das Trimeritgesetz der Verzwillingung
- Powder data for the chlorine derivatives of C.I. Pigment Red 9 and C.I. Pigment Brown 1
- Nyerereite: a new volcanic carbonate mineral from Oldoinyo Lengai, Tanzania
- The magnetic structures of NiWO4 and CoWO4
- A study of the structural chemistry of coesite
- Crystal structure of a synthetic, compositionally intermediate, hypersolvus alkali feldspar: evidence for Na, K site ordering
- Twinning and disorder in zinc perchlorate hexahydrate crystals
- Crystal data for the polymethine dye 1,3-bis (dimethylamino)-trimethinium perchlorate
- Unit-cell dimensions of Hofmann pyridine complexes
Artikel in diesem Heft
- Zeitschrift für Kristallographie 1877–1977
- The Zeitschrift für Kristallographie and Professor Dr. G. Menzer
- Die Molekular- und Kristallstruktur von N,N′-Disalicyliden-meso-1,2-diphenyläthylendiamin*
- Quadratischer elektrooptischer Tensor des rhombischen Calciumformiats
- Die Kristallstruktur von Cu2As3O6CH3COO
- Die Bestimmung der Kristallstruktur von Trimerit CaMn2(BeSiO4)3 und das Trimeritgesetz der Verzwillingung
- Powder data for the chlorine derivatives of C.I. Pigment Red 9 and C.I. Pigment Brown 1
- Nyerereite: a new volcanic carbonate mineral from Oldoinyo Lengai, Tanzania
- The magnetic structures of NiWO4 and CoWO4
- A study of the structural chemistry of coesite
- Crystal structure of a synthetic, compositionally intermediate, hypersolvus alkali feldspar: evidence for Na, K site ordering
- Twinning and disorder in zinc perchlorate hexahydrate crystals
- Crystal data for the polymethine dye 1,3-bis (dimethylamino)-trimethinium perchlorate
- Unit-cell dimensions of Hofmann pyridine complexes
