The chemical formula of mineral Narsarsukite is indicated by Na2(Ti,Fe)Si4(O,F)11 or Sodium Titanium Iron Silicate Fluoride. This Narsarsukite is actually a Silicate mineral. This mineral Narsarsukite is only used as mineral specimen and it is most often found exhibiting majestic appearance when viewed with the aid of petrographic polarizing light microscope used in the field of optical mineralogy. Narsarsukite is also cut as gemstones for gemstone purposes. Narsarsukite is also not a well known mineral but it is a nice collection mineral. Narsarsukite is named after its wonderful mineral locality at Narsarsuk, Greenland, from where the first specimens were described in 1900.
Mineral Narsarsukite is sometimes cut for gemstone purposes and it is usually found exhibiting nice and splendid appearance when viewed under gemological microscope. But then, mineral Narsarsukite may not be usually found in many jewelry stores. It is cut mostly for gemstone collectors. The structure of mineral Narsarsukite involves double chains of linked silicate tetrahedrons in a tube-like arrangement. The chains are actually kinked into a crankshaft shape with the kinks going up and down like a crankshaft. The chemistry of mineral Narsarsukite may include yttrium, calcium, potassium, but they are not usually significant enough to include the general formula.
Mineral Narsarsukite is most commonly found in various shades of yellow, pink, green and brown as well as colorless all of which can be seen more fascinating when viewed with the aid of polarized microscopes used in the field of optical mineralogy. Narsarsukite is also most commonly found exhibiting a vitreous or adamantine to dull or greasy luster when viewed in reflected light of polarized microscope for mineralogists. Mineral Narsarsukite is known to crystallize in the tetragonal system of crystal formation. In optical mineralogy, this tetragonal system comprises crystals having three axes, which are all in a position perpendicular to one another. Two axes are usually found having the same or equal length. The crystal habit of mineral Narsarsukite as described in the field of optical mineralogy usually includes tabular and prismatic crystals often arranged into sprays and parallel aggregates, which can be seen more clearly exhibited when viewed with the aid of polarized microscopes.
Mineral Narsarsukite is most commonly found showing perfect prismatic cleavage in two directions and good basal cleavage in one direction, all of which can be seen more clearly visible when specimen is evaluated with the aid of petrographic polarizing light microscopes used in the field of optical mineralogy. Narsarsukite is also most commonly found exhibiting uneven to subconchoidal fracture when evaluated under geological polarizing light microscopes. The hardness measure of the mineral when it is evaluated using the Mohs scale method is usually ranging from 6 to 7. The specific gravity measure of mineral Narsarsukite is approximately 2.6 grams per cubic centimeters to 2.8 grams per cubic centimeters. Narsarsukite is usually found leaving a white streak when rubbed on a white porcelain streak plate. Mineral Narsarsukite is usually found showing indices of refraction ranging from 1.601 to 1.614 and 1.632 to 1.647. The best field indicators of mineral Narsarsukite include localities, cleavage, crystal habit, association, and color. Narsarsukite is most commonly found associated with other interesting minerals including quartz, albite, aegerine, microline, natrolite, albite, lorenzenite, calcite, amphiboles, carletonite, and leucosphenite. Narsarsukite notably occurs at its type of locality at Narsarsuk, Greenland and perhaps the best source of Mont Saint-Hilaire, Quebec, Canada as well as North-Central Montana, USA. Narsarsuk, Greenland is actually the result of agpaitic pegmatite intrusions, an unusual igneous rock that is high in alkaline metals such as sodium and poor in silica. These intrusions also contain a large number of unusual elements such as titanium, fluorine and rare earth metals. Narsarsukite is also found at Mont Saint-Hilaire, Quebec, Canada. This is another agpaitic pegmatite location.
