Beschreibung:
<jats:title>Abstract</jats:title><jats:p>Single crystals of La<jats:sub>2</jats:sub>(SO<jats:sub>4</jats:sub>)<jats:sub>3</jats:sub> · 9 D<jats:sub>2</jats:sub>O were grown from saturated D<jats:sub>2</jats:sub>O solutions. According to X‐ray diffraction measurements, the crystals have a hexagonal structure with unit cell parameters <jats:italic>a</jats:italic> = 10.996 Å and <jats:italic>c</jats:italic> = 8.077 Å (space group C<jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="graphic/tex2gif-stack-1.gif" xlink:title="urn:x-wiley:00234753:media:CRAT19770120103:tex2gif-stack-1" />–P6<jats:sub>3</jats:sub>/m). Several physical properties were also determined (density, refractive indices, dielectric constants, specific heat, coefficient of linear expansion, microhardness).</jats:p>