Relationship between lattice constants and strontium and calcium contents of hokutolite
1982 Volume 11 Issue 2 Pages 62-71
Details
1982 Volume 11 Issue 2 Pages 62-71
Twenty-six natural lead-bearing barite specimens (hokutolite) from Peito Hot Spring, Tamagawa Hot Spring and Kawarage Hot Spring were studied to refine the relationship between their lattice constants and their chemical compositions.
It was found that the lattice constants of natural lead-bearing barite show negative deviations from the Vegard’s rule, which are probably due to small amounts of the third component of strontium. The negative deviations of the unit cell volume are ranging from 0.2 Å3 to 2.4 Å3 from the Vegard’s rule in terms of mole ratio of lead to barium. These deviations are correlated with the strontium content (as SrO) ranging from 0.07 wt.% to 1.79 wt.%.There is also a weak correlation between these deviations and calcium contents.
