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Mont Saint-Hilaire Unknowns - 50'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# 51 - (Al hydroxide (related to nordstrandite))
Properties - white, translucent to opaque balls or irregular powdery patches
Occurrence - silicate and sodalite syenite cavities and pegmatites
Associated minerals - albite, analcime, microcline, nordstrandite, polylithionite, pyrite and sphalerite (Top)
UK# 52 - (Hydrous K, Na, Mn, Fe silicate)
  UK-52
UK52 crystals
© Modris Baum
Properties - red to reddish brown platy crystals forming spherical aggregates; irregular grains with curved crystal faces
Occurrence - pegmatites
Associated minerals - albite, aegirine, analcime, ancylite-(Ce), calcite, microcline, pyrite, steacyite, vinogradovite and others (Top)
UK# 52A - (Hydrous K, Na, Mn, Fe silicate)
Properties - not distinguishable from UK# 52
Occurrence - pegmatites
Associated minerals - Same as UK# 52 (Top)
UK# 53 - (Na B silicate)
  UK-53
UK-53 crystals
© Stephan Wolfsried
Properties - colorless, white, pink, pale blue, vitreous transparent to translucent short hexagonal crystals with striations along c, botryoidal aggregates, balls and radiating clusters of prismatic individuals; heavily twinned (under polarizing scope)
Occurrence - sodalite xenoliths
Associated minerals - albite, cancrinite, erdite, lintisite, makatite, nalipoite, phosinaite-(Ce), rasvumite, sérandite, sidorenkite, silinaite, steenstrupine, tugtupite, ussingite, villiaumite, zakharovite and UK# 53A (Top)
UK# 53B - (NaB silicate)
Properties - similar to UK# 53, hexagonal modification to UK# 53
Occurrence - sodalite xenoliths
Associated minerals - similar to UK# 53 (Top)
UK# 55 - (Copper sulfide)
Properties - irregular grains, sub metallic, black with a violet tint
Occurrence - sodalite xenolith
Associated minerals - analcime, griceite, lovozerite, ussingite, villiaumite and 3 unidentified secondary phases (Top)
UK# 56 - (Hydrous Ca Nb oxide)
Properties - white balls of silky fibers, blades
Occurrence - hornfels (in albite-quartz veins)
Associated minerals - albite, ancylite-(Ce), beryl, muscovite, pyrrhotite, quartz and siderite (Top)