Table 1 Format of each data record: description, key label, data type.

DOI of the original paper

doi

string

Snippet of the raw text

paragraph_string

string

Chemical equation

reaction

Object (dict):

- element_substitution:

- left_side: list of Objects^a

- right_side: list of Objects^a

Chemical equation in string format

reaction_string

string

Target material data

target

Object (dict):

- material_string: string,

- material_formula: string,

- composition: list of Objects^b,

- additives: list of strings

- elements_vars: {var: list of strings}

- amounts_vars: {var: list of Objects^c}

- oxygen_deficiency: boolean

- mp_id: string

List of target formulas obtained after variables substitution

targets_string

list of strings

Precursor materials data

precursors

list of Objects (See target)

Sequence of synthesis steps and corresponding conditions

operations

list of Objects (dict):

- token: string,

- type: string

- conditions: Object

–heating_temperature: list of Objects^d

–heating_time: list of Objects^d,

–heating_atmosphere: list of strings

–mixing_device: list of strings

–mixing_media: list of strings