Motukoreaite has been found in association with apatite, barite, calcite, chabazite, calcic plagioclase, gismondine, gypsum, hisingerite, hydrotalcite, limonite, magnetite, montmorillonite, nordstrandite, olivine, phillipsite, pyroxene, quartz, and zeolites.
12.
"' Chabazite "'( ) is a tectosilicate mineral of the zeolite group, closely related to gmelinite, with formula ( Ca, Na 2, K 2, Mg ) Al 2 Si 4 O 12 ?H 2 O . Recognized varieties include Chabazite-Ca, Chabazite-K, Chabazite-Na, and Chabazite-Sr, depending on the prominence of the indicated cation.
13.
"' Chabazite "'( ) is a tectosilicate mineral of the zeolite group, closely related to gmelinite, with formula ( Ca, Na 2, K 2, Mg ) Al 2 Si 4 O 12 ?H 2 O . Recognized varieties include Chabazite-Ca, Chabazite-K, Chabazite-Na, and Chabazite-Sr, depending on the prominence of the indicated cation.
14.
"' Chabazite "'( ) is a tectosilicate mineral of the zeolite group, closely related to gmelinite, with formula ( Ca, Na 2, K 2, Mg ) Al 2 Si 4 O 12 ?H 2 O . Recognized varieties include Chabazite-Ca, Chabazite-K, Chabazite-Na, and Chabazite-Sr, depending on the prominence of the indicated cation.
15.
"' Chabazite "'( ) is a tectosilicate mineral of the zeolite group, closely related to gmelinite, with formula ( Ca, Na 2, K 2, Mg ) Al 2 Si 4 O 12 ?H 2 O . Recognized varieties include Chabazite-Ca, Chabazite-K, Chabazite-Na, and Chabazite-Sr, depending on the prominence of the indicated cation.
16.
"' Chabazite "'( ) is a tectosilicate mineral of the zeolite group, closely related to gmelinite, with formula ( Ca, Na 2, K 2, Mg ) Al 2 Si 4 O 12 ?H 2 O . Recognized varieties include Chabazite-Ca, Chabazite-K, Chabazite-Na, and Chabazite-Sr, depending on the prominence of the indicated cation.
17.
It is generally assumed that it forms at low temperatures, less than 100 �C . It is widespread as a hydrothermal alteration product of ussingite, Na 2 AlSi 3 O 8 ( OH ), associated with gobbinsite, Na 5 ( Si 11 Al 5 ) O 32 ?1H 2 O, gonnardite, ( Na, Ca ) 2 ( Si, Al ) 5 O 10 ?H 2 O, and chabazite-K.
18.
It also occurs at Yukspor Mountain, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, in an aegerine-natrolite-microcline vein in foyaite, associated with aegirine, anatase, ancylite-( Ce ), barylite, catapleiite, cerite-( Ce ), cerite-( La ), chabazite-( Ca ), edingtonite, fluorapatite, galena, ilmenite, microcline, natrolite, sphalerite and vanadinite.
19.
Generally occurs in Si-poor volcanic rocks, marine basalts and breccias, associated with other sodium zeolites such as analcime, Na ( Si 2 Al ) O 6 �H 2 O, natrolite, Na 2 ( Si 3 Al 2 ) O 10 ?H 2 O, and chabazite-Na, Na 2 Ca ( Si 8 Al 4 ) O 24 ?2H 2 O . It also occurs in Na-rich pegmatites in alkaline rocks, and as an alteration product in some nepheline syenite intrusions.
