The ferrierite group of
zeolite minerals (the FER structure) consists of three very similar species: ferrierite-
Mg, ferrierite-
Na, and ferrierite-
K, based on the dominant
cation in the A location. Ferrierites are
orthorhombic minerals with highly variable cationic composition, (Na,K)2Mg(Si,Al)18O36(OH)·9H2O. Calcium and other ions are often also present. They are found in vitreous to pearly, often radiating, spherical aggregates of thin blade-shaped transparent to translucent crystals.
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General Information:
Chemical Formula:
(Na2,K2,Mg,Ca)3-5Mg[Al5-7Si27.5-31O72]·18(H2O)
Environment:
Alteration product of basalts and as a diagenetic material in rhyolitic tuffaceous sediments and in metamorphic rocks.
Locality:
Railroad cut on the north shore of Kamloops lake, British Columbia, Canada.
Name Origin:
Named for Walter Frederick Ferrier (1865-1950), Canadian geologist and mining engineer.
Physical Properties:
Cleavage:
[100] Perfect, [001] Imperfect
Color:
colorless, white, pink, orange, or red.
Density:
2.06 - 2.23, Average = 2.14
Diaphaniety:
Transparent to translucent
Habits:
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite), Tabular - Form dimensions are thin in one direction.,
Hardness:
3-3.5 - Calcite-Copper Penny
Luminescence:
Non-fluorescent.
Luster:
Vitreous - Silky
Streak:
white
More details...
Atomic Mass : 257
Atomic Number : 100
Name Origins: Named after Enrico Fermi.
Year Discovered : 1942
Discovery Credits : Discovered in the debris of the 1952 thermonuclear explosion in the Pacific by G. R. Choppin, S. G. Thompson, A. Ghlorso, and B. G. Harvey.
More Details
Atomic Mass : 257
Atomic Number : 100
Name Origins: Named after Enrico Fermi.
Year Discovered : 1942
Discovery Credits : Discovered in the debris of the 1952 thermonuclear explosion in the Pacific by G. R. Choppin, S. G. Thompson, A. Ghlorso, and B. G. Harvey.
More Details
Atomic Mass : 257
Atomic Number : 100
Name Origins: Named after Enrico Fermi.
Year Discovered : 1942
Discovery Credits : Discovered in the debris of the 1952 thermonuclear explosion in the Pacific by G. R. Choppin, S. G. Thompson, A. Ghlorso, and B. G. Harvey.
More Details
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