# GridVectors

## 1.Brief description

The GridVectors object contains the grid vectors of the employed plane-wave basis set $$\{ G_1, ...,G_n \}$$. The set of grid vectors needs to be provided by an interfaced electronic structure theory package and can be read in using the Read algorithm.

- name: Read
in:
fileName: "GridVectors.yaml"
out:
tensor: GridVectors


## 2.Specification

An example GridVectors.yaml file is given below.

version: 100
type: Tensor
scalarType: Real64
dimensions:
- length: 3
type: Vector
- length:    819
type: Momentum
elements:
type: TextFile
unit: 0.529177249       # =(Bohr^-1/Angstrom^-1)

The last three lines correspond to the reciprocal lattice vectors (including the factor $$2\pi$$).