Liebermannite

KAlSi3O8

third-order Birch-Murnaghan · Original · 2025

V₀

233.89

Å³

Unit cell

K₀

203.500

GPa

Isothermal

K′

4.220

dimensionless

Volume (V₀)

Value	Unit	Basis	Z
233.89	Å³	Unit cell	—

Reported value and unit are preserved as extracted. Z (formula units per cell) is not stored yet, so molar ↔ Å³/f.u. conversion is not applied automatically.

Composition

Oxide	Molar
K2O	0.5
Al2O3	0.5
SiO2	3

Formula: KAlSi3O8

Conditions & method

T_ref: —
P_ref: —
Structure: hollandite / hollandite-II
Method: first-principles DFT / ab initio
first-principles calculations (DFT, LDA, quasiharmonic approximation)
Sample: This study (0–27 GPa), static

Source

Paper: Seismic signature of the upper continental crust: Implications from the thermoe…
Authors: Dong Wang; Longyu Duan; Xin Deng; Wenzhong Wang; Zhongqing Wu
DOI: 10.2138/am-2024-9562
Year: 2025
Journal: American Mineralogist
Origin: Original (measured or fitted in the source paper)

Evidence from the paper

Table 1: Liebermannite, This study (0–27 GPa), static, V0 = 233.89 Å³, K_T = 203.50 GPa, (∂K_T/∂P)_T = 4.22; 'Isothermal compression curves ... obtained by fitting the third-order Birch-Murnaghan equation'; 'K_T is the isothermal bulk modulus at 0 GPa.'