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Mont Saint-Hilaire Unknowns - 80'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# 80 - Na Fe Mn (SiO2)
Properties - dark brown massive patches to yellowish- brown fibers
Occurrence - sodalite xenolith
Associated minerals - aegirine, analcime, catapleiite, fluorite, microcline, natrolite, natron, pyrrhotite, sérandite, steenstrupine, thermonatrite,
UK# 78 and UK# 79 (Top)
UK# 82 - (Cu1.5Fe0.5)S · H20
Properties - metallic reddish-brown, hexagonal crystal with perfect basal cleavage
Occurrence - sodalite xenolith
Associated minerals - lovozerite, siderite, steenstrupine, terskite, ussingite, vuonnemite and zakharovite (Top)
UK# 82A - (Cu1.5Fe0.5)S · H20
Properties - sub-metallic black hexagonal, tabular crystals, micaceous; displays poor crystallinity
Occurrence - sodalite xenolith
Associated minerals - galena, langite, lueshite, molybdenite, posnjakite, sphalerite and wurtzite (Top)
UK# 83 - Th,Ca,Na,Mn,Ti (SiO2)
Properties - yellow-brown prismatic crystals and needles
Occurrence - sodalite xenolith
Associated minerals - lovozerite, siderite, steenstrupine, terskite, ussingite and vuonnemite (Top)
UK# 86 - (?, soon)
Properties - orange-brown prismatic crystals, grains
Occurrence - sodalite xenolith
Associated minerals - lovozerite, sidorenkite, terskite, ussingite, zakharovite and UK# 53A (Top)
UK-86
UK-86 crystals
© Modris Baum
UK# 87 - (Pb)
Properties - white to beige flaky coatings, fine grains on galena
Occurrence - sodalite xenolith
Associated minerals - galena, löllingite, sidorenkite, thalcusite, villiaumite and UK# 82A (Top)
UK# 89 - Na2CO3 · 7 H2O
Properties - colorless to white translucent shells on natron; alters to thermonatrite
Occurrence - sodalite xenolith
Associated minerals - natron and thermonatrite (Top)