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use super::Element;
use crate::Picometer;
#[cfg(feature = "ranges")]
/// Range from the minimum to the maximum atomic radius across all elements
///
/// Convenience constant to avoid writing the code below when this range is needed:
///
/// ```
/// use mendeleev::{Element, ATOMIC_RADIUS_RANGE};
/// let all_values = Element::iter().flat_map(|e| e.atomic_radius());
/// let min = all_values.clone().min_by(|a, b| a.total_cmp(&b)).unwrap();
/// let max = all_values.max_by(|a, b| a.total_cmp(&b)).unwrap();
/// assert_eq!(min..=max, ATOMIC_RADIUS_RANGE);
/// ```
pub const ATOMIC_RADIUS_RANGE: core::ops::RangeInclusive<Picometer> =
Picometer(25.0)..=Picometer(260.0);
macro_rules! pm {
($value:literal) => {
Some(Picometer($value))
};
}
impl Element {
/// Returns the element's empirically measured atomic radius, if available.
///
/// ```
/// use mendeleev::{Element, Picometer};
/// assert_eq!(Element::H.atomic_radius(), Some(Picometer(25.0)));
/// ```
pub const fn atomic_radius(&self) -> Option<Picometer> {
use Element as E;
match self {
E::H => pm!(25.0),
E::He => pm!(120.0),
E::Li => pm!(145.0),
E::Be => pm!(105.0),
E::B => pm!(85.0),
E::C => pm!(70.0),
E::N => pm!(65.0),
E::O => pm!(60.0),
E::F => pm!(50.0),
E::Ne => pm!(160.0),
E::Na => pm!(180.0),
E::Mg => pm!(150.0),
E::Al => pm!(125.0),
E::Si => pm!(110.0),
E::P => pm!(100.0),
E::S => pm!(100.0),
E::Cl => pm!(100.0),
E::Ar => pm!(71.0),
E::K => pm!(220.0),
E::Ca => pm!(180.0),
E::Sc => pm!(160.0),
E::Ti => pm!(140.0),
E::V => pm!(135.0),
E::Cr => pm!(140.0),
E::Mn => pm!(140.0),
E::Fe => pm!(140.0),
E::Co => pm!(135.0),
E::Ni => pm!(135.0),
E::Cu => pm!(135.0),
E::Zn => pm!(135.0),
E::Ga => pm!(130.0),
E::Ge => pm!(125.0),
E::As => pm!(115.0),
E::Se => pm!(115.0),
E::Br => pm!(115.0),
E::Kr => None,
E::Rb => pm!(235.0),
E::Sr => pm!(200.0),
E::Y => pm!(180.0),
E::Zr => pm!(155.0),
E::Nb => pm!(145.0),
E::Mo => pm!(145.0),
E::Tc => pm!(135.0),
E::Ru => pm!(130.0),
E::Rh => pm!(135.0),
E::Pd => pm!(140.0),
E::Ag => pm!(160.0),
E::Cd => pm!(155.0),
E::In => pm!(155.0),
E::Sn => pm!(145.0),
E::Sb => pm!(145.0),
E::Te => pm!(140.0),
E::I => pm!(140.0),
E::Xe => None,
E::Cs => pm!(260.0),
E::Ba => pm!(215.0),
E::La => pm!(195.0),
E::Ce => pm!(185.0),
E::Pr => pm!(185.0),
E::Nd => pm!(185.0),
E::Pm => pm!(185.0),
E::Sm => pm!(185.0),
E::Eu => pm!(185.0),
E::Gd => pm!(180.0),
E::Tb => pm!(175.0),
E::Dy => pm!(175.0),
E::Ho => pm!(175.0),
E::Er => pm!(175.0),
E::Tm => pm!(175.0),
E::Yb => pm!(175.0),
E::Lu => pm!(175.0),
E::Hf => pm!(155.0),
E::Ta => pm!(145.0),
E::W => pm!(135.0),
E::Re => pm!(135.0),
E::Os => pm!(130.0),
E::Ir => pm!(135.0),
E::Pt => pm!(135.0),
E::Au => pm!(135.0),
E::Hg => pm!(150.0),
E::Tl => pm!(190.0),
E::Pb => pm!(180.0),
E::Bi => pm!(160.0),
E::Po => pm!(190.0),
E::At => None,
E::Rn => None,
E::Fr => None,
E::Ra => pm!(215.0),
E::Ac => pm!(195.0),
E::Th => pm!(180.0),
E::Pa => pm!(180.0),
E::U => pm!(175.0),
E::Np => pm!(175.0),
E::Pu => pm!(175.0),
E::Am => pm!(175.0),
E::Cm => None,
E::Bk => None,
E::Cf => None,
E::Es => None,
E::Fm => None,
E::Md => None,
E::No => None,
E::Lr => None,
E::Rf => None,
E::Db => None,
E::Sg => None,
E::Bh => None,
E::Hs => None,
E::Mt => None,
E::Ds => None,
E::Rg => None,
E::Cn => None,
E::Nh => None,
E::Fl => None,
E::Mc => None,
E::Lv => None,
E::Ts => None,
E::Og => None,
}
}
}