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Mont Saint-Hilaire Unknowns - 60's

signifies that this unknown is on the fast-track toward description. means that this UK will need some help if it wants to go forward. indicates that this unknown is at a dead end for the time being.


The Unidentified
UK# 33A UK# 37A UK# 51 UK# 52 UK# 52A UK# 53
UK# 53B UK# 55 UK# 56 UK# 60(1) UK# 60(2) UK# 60A
UK# 67 UK# 68(1) UK# 68(2) UK# 68A UK# 70 UK# 72
UK# 73 UK# 75 UK# 77 UK# 78 UK# 79 UK# 80
UK# 82 UK# 82A UK# 83 UK# 86 UK# 87 UK# 89
UK# 91(1) UK# 91(2) UK# 94 UK# 95 UK# 98 UK# 99
UK# 101 UK# 105 UK# 107 UK# 108 UK# 111 UK# 113



UK# 60(1) - (Hydrous carbonate of Sr, Ba, Ca and REE, where Sr > Ba)
Properties - small pearly white, hexagonal plates or flakes in rosettes; irregular clusters
Occurrence - silicate cavities
Associated minerals - albite, aegirine, clinoamphiboles, eudialyte, fluoroapatite, microcline, natrolite, rinkite (Top)
UK-60 - click for larger format
UK-60 crystals
© Jason B. Smith
UK# 60(2) - (Hydrous carbonate of Sr, Ba, Ca and REE, where Sr > Ba)
Properties - small pearly white, hexagonal thin plates or flakes in rosettes; irregular clusters
Occurrence - sodalite xenolith
Associated minerals - catapleiite, fluorite, microcline, pyrochlore, rinkite, sérandite (Top)
UK# 60A - (Hydrous carbonate of Sr, Ba, Ca and REE, where Ba > Sr)
Properties - similar to UK# 60;
Occurrence - silicate cavities, sodalite xenolith
Associated minerals - albite, aegirine, catapleiite, clinoamphiboles, eudialyte, fluorite, fluoroapatite, microcline, natrolite, pyrochlore, rinkite and sérandite (Top)
UK# 67 - (Zr, Na, K, Mn, Ca and Fe silicate)
Properties - white translucent balls
Occurrence - igneous breccia
Associated minerals - aegirine, calcite, eudialyte, fluorite, hilairite, microcline, pectolite and pyrite (Top)
UK# 68(1) - (Na, Mn, Nb oxide or hydroxide)
Properties - thin bright yellow plates, alters to red crumbly masses of splintered pieces (68A?) of poor crystallinity
Occurrence - silicate cavities
Associated minerals - aegirine, eudialyte, fluoroapatite, fluorite, gonnardite and rhabdophane-(Ce)(Top)
UK# 68(2) - (Na, Mn, Nb oxide or hydroxide)
Properties - bright red rhombs; alters to crumbly yellow
Occurrence - sodalite xenolith
Associated minerals - (?) (Top)
UK# 68A - (Na, Mn, Nb oxide or hydroxide)
Properties - red lath like crystals; altered in lab to UK# 68
Occurrence - silicate cavities
Associated minerals - aegirine, eudialyte, fluoroapatite, fluorite, gonnardite and rhabdophane-(Ce)(Top)