retrieve the geomaterials that less than the given optical 2v.

: Queries the geomaterials have the lower optical 2v value than the given lt.

Usage

geomaterials_optical2v_max(lt, ...)

Arguments

lt

list of the signs.Please refer to the details.

...,

Further named parameters.Other optional arguments.

Value

df, a data frame of geomaterials

Details

This function releated to the field "optical2v_max" of geomaterials. optical2vcalc:The calculated 2V angle minimum or average of biaxial minerals optical2vcalc2:The calculated 2V angle maximum of biaxial minerals optical2vmeasured:The measured 2V angle minimum or average of biaxial minerals optical2vmeasured2:The measured 2V angle maximum of biaxial minerals

Examples

if (FALSE) {
df <-geomaterials_optical2v_max(0.2)
}