From ae01589d261fc01c819a6341b2a5c300849312d8 Mon Sep 17 00:00:00 2001
From: "Adam J. Jackson" <a.j.jackson@physics.org>
Date: Wed, 6 Sep 2023 09:54:55 +0100
Subject: [PATCH] Comment on mysterious "dimensionless" casting

Requested by @oerc0122
---
 euphonic/powder.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/euphonic/powder.py b/euphonic/powder.py
index c20ebf455..b51105e07 100644
--- a/euphonic/powder.py
+++ b/euphonic/powder.py
@@ -345,6 +345,7 @@ def _qpts_cart_to_frac(qpts: Quantity,
     """
     lattice = crystal.reciprocal_cell()
 
+    # Cast 'dimensionless' to ensure length units are cancelled properly
     return np.linalg.solve(lattice.T, qpts.T).T.to('dimensionless').magnitude