δ = 1000·R_s/R_std − 1000; δ|_{R=R_std} = 0 ‰; δ|_{R=2R_std} = 1000 ‰

Layer 2 — Chemistryin the geochemistry subtree

Sympy-exact witness of the δ-notation definition and its two calibration anchors. Setup: R_s (sample isotope ratio) and R_std (standard reference ratio) declared positive; δ(R_s, R_std) = 1000·(R_s/R_std - 1) expanded as 1000·R_s/R_std -…

Related concepts

δ-notation framework: δ = (R_sample/R_std − 1)·1000 ‰ (parts-per-mille isotope-ratio deviation)
Milankovitch cycles

Explore δ = 1000·R_s/R_std − 1000; δ|_{R=R_std} = 0 ‰; δ|_{R=2R_std} = 1000 ‰ on the interactive knowledge graph →