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Preparation

Lanthanum diiodide can be obtained from the reduction of lanthanum(III) iodide with lanthanum metal under a vacuum at 800 to 900 °C:²

It can also be obtained by reacting lanthanum and mercury(II) iodide:³

It was first created by John D. Corbett in 1961.⁴

Properties

Lanthanum diiodide is a blue-black solid with metallic lustre, which is easily hydrolyzed into the iodide oxide.⁵ It has a MoSi2-type structure, with the space group I4/mmm (No. 139).⁶

References

1. Holleman, Arnold F.; Walter de Gruyter GmbH & Co. KG (2017). Anorganische Chemie Band 2. Nebengruppenelemente, Lanthanoide, Actinoide, Transactinoide (in German). Berlin. p. 1789. ISBN 978-3-11-051854-2. OCLC 968134924.{{cite book}}: CS1 maint: location missing publisher (link) 978-3-11-051854-2 ↩

2. Brauer, Georg (1963). Handbook of Preparative Inorganic Chemistry V1. Burlington: Elsevier Science. p. 1081. ISBN 978-0-323-16127-5. OCLC 843200092. {{cite book}}: ISBN / Date incompatibility (help) 978-0-323-16127-5 ↩

3. Brauer, Georg (1963). Handbook of Preparative Inorganic Chemistry V1. Burlington: Elsevier Science. p. 1081. ISBN 978-0-323-16127-5. OCLC 843200092. {{cite book}}: ISBN / Date incompatibility (help) 978-0-323-16127-5 ↩

4. Jungmann, Angelika; Claessen, R.; Zimmermann, R.; Meng, Ge; Steiner, P.; Hüfner, S.; Tratzky, S.; Stöwe, K.; Beck, H. P. (1995). "Photoemission of LaI2 and CeI2". Zeitschrift für Physik B. 97 (1). Springer Science and Business Media LLC: 25–34. Bibcode:1995ZPhyB..97...25J. doi:10.1007/bf01317584. ISSN 0722-3277. S2CID 124057481. /wiki/Bibcode_(identifier) ↩

5. Brauer, Georg (1963). Handbook of Preparative Inorganic Chemistry V1. Burlington: Elsevier Science. p. 1081. ISBN 978-0-323-16127-5. OCLC 843200092. {{cite book}}: ISBN / Date incompatibility (help) 978-0-323-16127-5 ↩

6. Riedel, Erwin; Janiak, Christoph; Meyer, Hans-Jürgen (2012). Riedel, moderne anorganische Chemie (in German). Berlin: De Gruyter. p. 240. ISBN 978-3-11-024900-2. OCLC 781540844. 978-3-11-024900-2 ↩