Skip to main content

Science – Society – Technology

Table 2 Mineralogical composition of fresh basalt, calculated using the chemical composition given by Markusson and Stefansson (2011). Molar mass = 228.63 g/mol and density = 3.1 g/cm3

From: Differential alteration of basaltic lava flows and hyaloclastites in Icelandic hydrothermal systems

Mineral

Formula

M

% mol

Albite

NaAlSi3O8

262.223

0.16

Anorthite

CaAl2Si2O8

277.41

0.24

Diopside

CaMgSi2O6

216.55

0.25

Enstatite

Mg2Si2O6

200.7774

0.08

Forsterite

Mg2SiO4

140.6931

0.09

Fayalite

Fe2SiO4

203.773

0.16

Magnetite

Fe3O4

231.54

0.02