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Mont Saint-Hilaire Unknowns - 90'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# 91(1) - (Na,Y,REE,Al)(CO3)
Properties - white silky aggregate of fibers
Occurrence - (?)
Associated minerals - analcime, catapleiite, epididymite, eudialyte, leifite, rhodochrosite and sérandite (Top)
UK# 91(2) - (Na,Y,REE,Al)(CO3)
Properties - white silky aggregate of fibers
Occurrence - (?)
Associated minerals - catapleiite, manganotychite, petersenite-(Ce), reederite-(Y), shortite and trona (Top)
UK# 94 - Na,Fe(SiO2)
Properties - beige, very small round grains
Occurrence - sodalite xenolith
Associated minerals - löllingite, molybdenite, tetrahedrite, thermonatrite and villiaumite (Top)
UK# 95 - Na,Mn,Ca,REE (PO4)
Properties - spherical aggregates of prismatic crystals
Occurrence - (?)
Associated minerals - analcime, aegirine, eudialyte, lovozerite and natrolite (Top)
UK# 98 - Na (CO3) (HO)
Properties - white efflorescence
Occurrence - sodalite xenolith
Associated minerals - lintisite, revdite, thermonatrite and UK# 53 (Top)
UK# 99 - Sr,Na,Zr (SiO2)
Properties - gray hexagonal prismatic crystals, with pinacoidal termination; only two crystals found
Occurrence - (?)
Associated minerals - biotite, manganotychite, microcline, nenadkevichite, pyrrhotite and zircon
NOTES - Structure has finally been solved. This one will be submitted for approval soon (Top)