What is the chemical structure of jadeite?

What is the chemical structure of jadeite?

Jadeite is a pyroxene mineral with composition NaAlSi2O6. It is monoclinic. It has a Mohs hardness of about 6.5 to 7.0 depending on the composition….

Formula (repeating unit) NaAlSi2O6 or Na(Al,Fe3+)Si2O6
Strunz classification 9.DA.25
Crystal system Monoclinic
Crystal class Prismatic (2/m) (same H-M symbol)

What is jadeite rock?

Jadeite, gem-quality silicate mineral in the pyroxene family that is one of the two forms of jade (q.v.). The more prized of the two types of jade, jadeite (imperial jade) is usually found as transparent-to-opaque, compact, cryptocrystalline lenses, veins, or nodules.

What is physical properties of jadeite?

Physical Properties: Jadeite and Nephrite
Jadeite Nephrite
Mohs Hardness 6.5 to 7 6 to 6.5
Specific Gravity 3.3 to 3.5 3.0 to 3.3
Diagnostic Properties Refractive index, toughness, hardness, specific gravity, grain size and habit. Color, toughness, hardness, specific gravity, grain size, and habit.

What does jadeite look like?

Jadeite Information. Monoclinic. Crystals very rare and tiny, usually granular with tough, interlocked crystals: fibrous; as alluvial boulders and pebbles. Colorless, white, all shades of green, yellow-green, yellowish brown, brown, red, orange, violet (mauve), blue (rare), gray, black, purple.

How can you tell if a rock is jadeite?

Opaque to translucent. Jadeite has a distinctive spectrum useful in identification. There is a strong line at 4375 and weak bands at 4500 and 4330. The 4375 line is diagnostic but may not be seen in rich, deep green material, which has a chromium spectrum: strong line at 6915, weak at 6550 and 6300.

What is the rarest rock on Earth?

Painite : Not just the rarest gemstone, but also the rarest mineral on earth, Painite holds the Guinness World Record for it. After its discovery in the year 1951, there existed only 2 specimens of Painite for the next many decades.

How is the crystal structure of jadeite determined?

American Mineralogist 1966;; 51 (7): 956–975. doi: The crystal structure of naturally occurring pure jadeite has been refined by least-squares methods using single-crystal x -ray intensity data obtained by counter-diffractometer techniques.

What kind of minerals are found in jadeite?

Pyroxene Group – Clinopyroxene Subgroup. Jadeite-Kosmochlor Series. Rarely found as euhedral crystals, most commonly as the monomineralic metamorphic rock jadeitite which is often used as an ornamental gem and carving material as which it is known as jadeite jade.

Which is the correct formula for jadeite oxide?

General Jadeite Information Chemical Formula: Na(Al,Fe+++)Si2O6 Composition: Molecular Weight = 205.03 gm Sodium 11.21 % Na 15.11 % Na2O Aluminum 11.84 % Al 22.38 % Al2O3 Iron 2.72 % Fe 3.89 % Fe2O3 Silicon 27.40 % Si 58.61 % SiO2 Oxygen 46.82 % O 100.00 % 100.00 % = TOTAL OXIDE Empirical Formula:

Which is the least desirable quality of jade?

Jadeite Jade Quality Factors. It almost appears to glow, increasing the charm of a lush green or rich lavender hue. The least desirable jadeites are completely opaque or have opaque or cloudy patches that break up their transparency. Some jadeite is transparent enough to allow the observer to see into the stone,…

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