What is the chemical equation for zinc metal and sulphur powder are heated the form solid zinc (I) sulfide?

Here is the formula...
Zn(s)  +  S(s)  ——>  ZnS(s)
More info on the chemical reaction (which is violent)...
www.angelo.edu This is the MSDS (material safety data sheet) from one supplier in case you have to handle it (zinc sulfide burns the skin)...
www.sciencelab.com/xMSDS-Zinc_sulfide-9927331