The structure of the lead end-member senaite of the crichtonite group was determined in 1976 by Grey & Lloyd.
2.
The structure of the other members of the crichtonite group is similar and corresponds to the formula AM 21 O 38.
3.
"' Loveringite "'is a rare metallic oxide mineral of the crichtonite group with the chemical formula ( Ca, Ce ) ( Ti, Fe, Cr, Mg ) 21 O 38.
4.
The following minerals are also found in the veins of cleusonite; quartz, chlorite, calcite, albite, microcline, tourmaline, fluorapatite, zircon, ilmenite, hematite, titanite, pyrite, chalcopyrite, tennantite, rutile, crichtonite, monazite-( Ce ), and native gold.
5.
The crichtonite group consists of members of related mineral species of the type A { BC 2 D 6 E 12 } O 38 which are characterized by their predominant cations ( as seen in crichtonite ( Sr ), senaite ( Pb ), davidite ( REE + U ), landauite ( Na ), loveringite ( Ca ), lindsleyite ( Ba ), and mathiasite ( K ).
6.
The crichtonite group consists of members of related mineral species of the type A { BC 2 D 6 E 12 } O 38 which are characterized by their predominant cations ( as seen in crichtonite ( Sr ), senaite ( Pb ), davidite ( REE + U ), landauite ( Na ), loveringite ( Ca ), lindsleyite ( Ba ), and mathiasite ( K ).
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