Crystal Splitter
In June 2026, scientists discovered molybdenum oxychloride (MoOCl₂) has the strongest light-bending effect ever measured in a natural material — Δn ≈ 1.6, nearly 10× calcite. Adjust the optic axis angle and watch unpolarized light split into ordinary and extraordinary rays inside each crystal.
Discovered in June 2026 to have the strongest birefringence ever measured in a natural material — Δn ≈ 1.6, nearly 10× calcite. A layered van der Waals crystal (like graphene) that can be exfoliated into atomically thin sheets, enabling ultrathin AR glasses and smart contact lenses.
Δn birefringence
1.600
nₒ ordinary
2.100
nₑ extraordinary
3.700
max split at 45°
27.1°
Birefringence · cycles every 6.5 s
The Discovery · June 2026
Scientists measured the strongest birefringence ever found in a natural material: molybdenum oxychloride (MoOCl₂), with Δn ≈ 1.6 — nearly 10× calcite, which had held the benchmark for 357 years.