new chemistry reagent and recipe used with xenoarch

Signed-off-by: caelaislinn <cael_aislinn@yahoo.com.au>

code/modules/chemical/Chemistry-Machinery.dm

@@ -14,7 +14,7 @@
 	var/max_energy = 75
 	var/amount = 30
 	var/beaker = null
-	var/list/dispensable_reagents = list("hydrogen","lithium","carbon","nitrogen","oxygen","fluorine","sodium","aluminum","silicon","phosphorus","sulfur","chlorine","potassium","iron","copper","mercury","radium","water","ethanol","sugar","acid","milk",)
+	var/list/dispensable_reagents = list("hydrogen","lithium","carbon","nitrogen","oxygen","fluorine","sodium","aluminum","silicon","phosphorus","sulfur","chlorine","potassium","iron","copper","mercury","tungsten","radium","water","ethanol","sugar","acid","milk",)
 	var/charging_reagents = 0
 
 	ex_act(severity)

code/modules/chemical/Chemistry-Reagents.dm

@@ -657,6 +657,13 @@ datum
 			reagent_state = SOLID
 			color = "#832828" // rgb: 131, 40, 40
 
+		tungsten	//used purely to make lith-sodi-tungs, which is used in xenoarch
+			name = "Tungsten"
+			id = "tungsten"
+			description = "A chemical element, and a strong oxidising agent."
+			reagent_state = SOLID
+			color = "#808080" // rgb: 128, 128, 128, meant to be a silvery grey but idrc
+
 		lithium
 			name = "Lithium"
 			id = "lithium"

code/modules/chemical/Chemistry-Recipes.dm

@@ -312,6 +312,13 @@ datum
 			required_reagents = list("sodium" = 1, "chlorine" = 1)
 			result_amount = 2
 
+		lithiumsodiumtungstate	//LiNa2WO4, not the easiest chem to mix
+			name = "Lithium Sodium Tungstate"
+			id = "lithiumsodiumtungstate"
+			result = "lithiumsodiumtungstate"
+			required_reagents = list("lithium" = 1, "sodium" = 2, "tungsten" = 1, "oxygen" = 4)
+			result_amount = 8
+
 		flash_powder
 			name = "Flash powder"
 			id = "flash_powder"