[sslaptnhablhat]

I know this may seem oddly specific, but does elemental Iodine react with pure Tungsten, Aluminium and/or Dysprosium? It doesn't appear to react with stainless steel, even when boiling, and from what I've observed it just converts to the Triiodide allotrope with Aluminium, but I'd like some clarification nonetheless.

[chenbeier]

Tungston yes: see principle of halogen lamp
Aluminium yes: catalyst in organic reactions
Dysprosiumiodid yes: Used in high pressure discharge  lamp