There can also be some difficulty in extracting all the exchangeable [Na.sup.+], and Wong and Ho (1995) showed divalent cations were ineffective at extracting exchangeable Na held in the structure of the sodalite
and/or cancrinite present in bauxite residue.
I searched for a name of a rock formation and discovered that low-silica igneous rocks may have large masses of sodalite
, a mineral which has a rich blue color, ranging from clear to violet.
However, synthesis of sodalite
is corresponding to about 86.0% of [K.sup.+] extracted, and 92.6% of [K.sup.+] was recovered from the solution after analcime synthesis.
2) is coarse-grained and rich in K-feldspar and albite (combined about 70%); it contains conspicuous yellow granular-textured cancrinite, greasy-grey coarsegrained nepheline, and less common fine-grained blue sodalite
. Accessory minerals include coarse-grained biotite that is typically segregated into streaks within the lighter colored minerals, and euhedral zircon prisms up to 5 mm in length.
Bayer process plant scale: transformation of sodalite
These rocks contain mineral 'nepheline' as their major component along with other feldspathoidal minerals, like, cancrinite and sodalite
[1, 12, 13, 17].
At the centre of the marble floor in the ROM's 1933 Rotunda a variegated star, cut from sodalite
, lies within successively larger starburst patterns.
Singh B, Gilkes RJ (1991a) Concentration of iron oxides from soil clays by 5 M NaOH treatment: the complete removal of sodalite
At the Main Show, French dealer Francois Lietard (firstname.lastname@example.org) and Colorado dealer Dudley Blauwet (mtnmin @attglobal.et) had between them about 30 specimens showing the new, highly lustrous, madly bright blue crystals of sodalite
from a find somewhere in the Kokcha Valley, Badakhshan, Afghanistan.
Within two blocks of this intersection we can see a beautiful polished slab of sodalite
with blebs of magnetite that can stop a speeding magnet (Fig.
Iita said the contribution from dimension stones such as granite, marble and sodalite
, as well as semi-precious stones, is not very significant and is expected to remain unchanged in the short- to medium-term.