METHOD OF RESTORING DIAMOND GENESIS TEMPERATURE-TIME CONDITIONS Russian patent published in 2015 - IPC G01N21/35 G01V9/00 

FIELD: chemistry.

SUBSTANCE: invention relates to physical-chemical analysis methods and can be used in diamond analysis. Disclosed is a method of restoring temperature-time conditions for genesis of diamonds of the type IaAB or mixed type Ib-IaA, based on calculation, from local concentrations of impurity nitrogen in forms C, A and B in a crystal, measured for example by infrared microspectroscopy, of local values of an integral parameter K_nt of aggregation kinetics of the n-th order of corresponding nitrogen centres. The method further includes recording the change in values of the integral aggregation parameter of corresponding nitrogen centres Δ(K_nt) on crystal growth layers, for example in any region of the thin diamond plate crossing the growth layers. The temperature T and time Δt of genesis are determined using the equation A_rexp(-E_a/k_BT)×Δt=Δ(K_nt), where: k_B is Boltzmann constant, A_r and E_a denote Arrhenius constant and activation energy of the process of aggregation of C- or A-centres, corresponding to the aggregation kinetics order n.

EFFECT: high reliability of recovering the history of genesis of a diamond crystal.

5 cl, 8 tbl, 26 dwg