Editing Sodium (section)

===Intermetallic compounds===
Sodium forms alloys with many metals, such as potassium, [[calcium]], [[lead]], and the [[group 11 element|group 11]] and [[group 12 elements|12]] elements. Sodium and potassium form KNa<sub>2</sub> and [[NaK]]. NaK is 40–90% potassium and it is liquid at [[ambient temperature]]. It is an excellent thermal and electrical conductor. Sodium-calcium alloys are by-products of the electrolytic production of sodium from a binary salt mixture of NaCl-CaCl<sub>2</sub> and ternary mixture NaCl-CaCl<sub>2</sub>-BaCl<sub>2</sub>. Calcium is only partially [[miscible]] with sodium, and the 1–2% of it dissolved in the sodium obtained from said mixtures can be precipitated by cooling to 120&nbsp;°C and filtering.<ref name="pearson1991">{{cite book |author1=Paul Ashworth |author2=Janet Chetland |editor1-last=Brian |editor1-first=Pearson |title=Speciality chemicals: Innovations in industrial synthesis and applications |date=31 December 1991 |publisher=Elsevier Applied Science |location=London |isbn=978-1-85166-646-1 |pages=259–278 |access-date=27 July 2021 |url=https://books.google.com/books?id=i0AEIrEUfg0C&pg=PA259 |edition=illustrated |archive-date=16 December 2021 |archive-url=https://web.archive.org/web/20211216161948/https://books.google.com/books?id=i0AEIrEUfg0C&pg=PA259 |url-status=live }}</ref>

In a liquid state, sodium is completely miscible with lead. There are several methods to make sodium-lead alloys. One is to melt them together and another is to deposit sodium electrolytically on molten lead cathodes. NaPb<sub>3</sub>, NaPb, Na<sub>9</sub>Pb<sub>4</sub>, Na<sub>5</sub>Pb<sub>2</sub>, and Na<sub>15</sub>Pb<sub>4</sub> are some of the known sodium-lead alloys. Sodium also forms alloys with [[gold]] (NaAu<sub>2</sub>) and [[silver]] (NaAg<sub>2</sub>). Group 12 metals ([[zinc]], [[cadmium]] and [[Mercury (element)|mercury]]) are known to make alloys with sodium. NaZn<sub>13</sub> and NaCd<sub>2</sub> are alloys of zinc and cadmium. Sodium and mercury form NaHg, NaHg<sub>4</sub>, NaHg<sub>2</sub>, Na<sub>3</sub>Hg<sub>2</sub>, and Na<sub>3</sub>Hg.<ref>{{cite book|title=Alloys: Preparation, Properties, Applications|last=Habashi|first=Fathi|publisher=John Wiley & Sons, 2008|isbn=978-3-527-61192-8|pages=278–280|date=21 November 2008}}</ref>