<page_title> International Temperature Scale of 1990 </page_title> <section_title> Defining points </section_title> <table> <cell> Triple point of hydrogen <col_header> Substance and its state </col_header> <col_header> K </col_header> </cell> <cell> −259.3467 <col_header> Defining point (range) </col_header> <col_header> °R </col_header> </cell> <cell> Freezing point of aluminium <col_header> Substance and its state </col_header> <col_header> K </col_header> </cell> <cell> 660.323 <col_header> Defining point (range) </col_header> <col_header> °R </col_header> </cell> </table>
The triple point of hydrogen's defining point is −259.3467 °C, and the freezing point of aluminium's defining point is 660.323 °C.