Cover Picture: Cryst. Res. Technol. 6/2009

The cover picture shows a projection of a part of the melilite structure approximately along the c‐axis of the structure of Sr₂ZnGe₂O₇, showing thermal displacement ellipsoids (50% probability level). Coordination polyhedra [SrO₈] (grey), [ZnO₄] (red) and groups [Ge₂O₇] (green) are indicated. (see pages 603 – 612) (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

Cover Picture: Cryst. Res. Technol. 1/2010

The cover picture shows a photograph of NaBi(WO₄)₂ crystals grown from a sintered charge in resistive furnace (left), a sintered charge in inductive furnace (middle) and a re‐crystallized charge in inductive furnace (right). (see pages 18–24). (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

Cover Picture: Cryst. Res. Technol. 5/2011

The cover picture shows spontaneously nucleated AlN boules grown on the crucible lids (above) and an AlN single crystal grown on the (10 0)‐face of a seed. (see pages 455–458) (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

Cover Picture: Cryst. Res. Technol. 4/2012

The cover picture shows a BPO₄ crystal illuminated with a 532 nm laser of 5 mW. (see pages 391–396) (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

Cover Picture: Cryst. Res. Technol. 8/2009

The cover picture shows as grown garnet Y₃Al₅O₁₂ (YAG): Co, Si single crystals obtained by then Czochralski method with a diameter of 2 cm. From left till right: – YAG: 0.4 at.%Co, – YAG: 0.4 at.%Co, 0.2 at.%Si, – YAG: 0.8 at.%Co, 0.4 at.%Si. (see pages 823–833) (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

Cover Picture: Cryst. Res. Technol. 3/2011

The cover picture shows FESEM images of highly symmetric polyhedral microcrystals of cuprous oxide (Cu₂O) prepared by a low temperature hydrothermal reaction. (see pages 300–304) (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

Cover Picture: Cryst. Res. Technol. 12/2011

The cover picture shows a ⁴⁰Ca¹⁰⁰MoO₄ single crystal grown by Czochralski technique and a cubic sample cut from the same crystal. (see pages 1223–1228) (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

Cover Picture: Cryst. Res. Technol. 10/2009

The cover picture shows a single crystal of K₂La(NO₃)₅ · 2 H₂O grown at 38 °C from diluted HNO₃. View approximately along the polar –<$>\vec a_3<$> axis of the crystal. (see pages 1131 – 1138) (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

Cover Picture: Cryst. Res. Technol. 5/2012

The cover picture shows doped europium tetrakis dibenzoylmethide triethylammonium crystals illuminated with: (left) Standard room light, and (right) Ultraviolet light. (see pages 573–578) (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

Cover Picture: Cryst. Res. Technol. 2/2012

The cover picture shows the 3‐D morphology of a Sapphire crystal grown under the condition of T_H = 2500‐3t K, u = U2. (see pages 175–182) (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

Cover Picture: Cryst. Res. Technol. 12/2009

The cover picture shows a secondary electron microscopy (SEM) image of sheet‐like Cu dendrites. (see pages 1293–1296) (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

Cover Picture: Cryst. Res. Technol. 9/2011

The cover picture shows a photograph of KDP crystals grown with various concentrations of WO₄². (see pages 939–943) (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

Cover Picture: Cryst. Res. Technol. 5/2009

The cover picture shows a secondary electron microscopy (SEM) image of a forsterite monocrystal grown by flux growth technique doped with Ni. (see pages 463 – 468). (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

Cover Picture: Cryst. Res. Technol. 7/2011

The cover picture shows a β–BaB₂O₄ crystal grown by Top Seeded Solution Growth technique with continuous pulling from a NaF flux. (see pages 651–654) (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

Cover Picture: Cryst. Res. Technol. 7/2009

The cover picture shows a secondary electron microscopy (SEM) image of a CuS nanoplate‐based architecture. (see pages 729–735) (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

Cover Picture: Cryst. Res. Technol. 2/2009

The cover picture shows a photograph of an Li₆Gd(BO₃)₃:Ce crystal grown by Czochralski method. (see pages 141 – 145). (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

Reciprocal crystal and P.B.C.-vector method. Crystal growth of a-sulphur

The morphological lattice of α-sulphur (F ddd) has coordinates 1/8, 1/8, 0. The reciprocal crystal is a polyhedron with 15 faces and point symmetry 112. The arrangements of the polyhedra parallel to the crystal faces confirm that (100), (101), (010), (011), (111), (113), (001) are F-faces and (110), (112) S-faces according to Hartman and Perdok. Under consideration of the extinction rules of the morphological lattice (101) and (011) have to be regarded as S-faces. The size of the polyhedra faces is proportional to the interaction energy given by Hartman. It will be shown that the face area of the net planes, divided by the number of molecules per growth layer, represent a good approximation to the attachment energy calculated according to Hartman. The average deviation for α-sulphur is 3%, for olivine and SnJ₄ 8.5% and for anthracene 10.5%. The Wulff-plots correspond fully to the experimental observations.     

Cover Picture: Cryst. Res. Technol. 1/2011

The cover picture shows an isosurface of the difference between instantaneous and averaged temperature, colored by geometric height using a large eddy simulation of Marangoni convection in Czochralski crystal growth. (see pages 14–22) (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

Cover Picture: Cryst. Res. Technol. 3/2009

The cover picture shows the microstructural diversity of a benzoic acid‐salicylic acid eutectic composite material by different modes of solidification. Morphology of eutectic composite material in isotropic growth at room temperature (left) and random growth at 310 K (right). (see pages 258 – 268) (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

Cover Picture: Cryst. Res. Technol. 2/2011

The cover picture shows rhombohedral monoclinic insulin crystals; interference contrasting. Objective 12.5x, magnification 20x. (see pages 119–126) (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)