Crystallography of beryl

  • How is beryl made?

    Beryl minerals are made of beryllium aluminum silicate: Be3Al2(Si6O18).
    They form in granite pegmatite rocks and hydrothermal carbonate veins and cavities, where hydrothermal processes have modified the granitic composition.
    Beryls can also be found in gem-gravel placer (alluvial) deposits..

  • What are the optical properties of beryl?

    Optical Properties: Transparent to translucent.
    Color: Colorless, white, pale blue to sky-blue, bluish green through green to greenish yellow or yellow, rose to peach, deep pink to raspberry-red; may be zoned; commonly colorless in thin section.
    Streak: White..

  • What are the properties of beryl crystal?

    Optical Properties: Transparent to translucent.
    Color: Colorless, white, pale blue to sky-blue, bluish green through green to greenish yellow or yellow, rose to peach, deep pink to raspberry-red; may be zoned; commonly colorless in thin section.
    Streak: White..

  • What is the birefringence of beryl?

    Birefringence: 0.004 to 0.009, depending on variety.
    Optical sign: uniaxial negative.
    Dispersion: low, 0.014.
    Pleochroism: weak to moderate, strong in "True Blue Beryl" and pezzottaite..

  • What is the chemical structure of beryl?

    Beryl (/ˈbɛrəl/ BERR-əl) is a mineral composed of beryllium aluminium silicate with the chemical formula Be3Al2Si6O18.
    Well-known varieties of beryl include emerald and aquamarine.
    Naturally occurring, hexagonal crystals of beryl can be up to several meters in size, but terminated crystals are relatively rare..

  • What is the crystal habit of beryl?

    Crystal habitPrismatic to tabular crystals; radial, columnar; granular to compact massiveTwinningRareCleavageImperfect on {0001}FractureConchoidal to irregular.

  • What is Beryl? Beryl is a relatively rare silicate mineral with a chemical composition of Be3Al2Si6O18.
    It is found in igneous and metamorphic rocks in many parts of the world.
    Beryl has served as a minor ore of beryllium, and color varieties of the mineral are among the world's most popular gemstones.
Beryl, Be

What is a beryl crystal?

Possibly from the Greek "beryllos" which referred to a number of blue-green stones in antiquity

May be confused with apatite

The largest beryl crystal reported was 18 m long and 3

5 m wide from Malakialina, Madagascar, but in the absence of anything more than a personal communication, the report is doubtful

What is the C / a ratio of Beryl?

The c / a ratio is typical for “normal” (mixed octahedral and tetrahedral) type beryl ( Aurisicchio et al

, 1988) in the Tsaobismund and Kuduberge samples, while Etusis and Engelbrecht's beryl belong to the tetrahedral type ( Fig

8 ), which is consistent with our chemical data

Table 4

Where are the largest beryls found?

New England's pegmatites have produced some of the largest beryls found, including one massive crystal from the Bumpus Quarry in Albany, Maine with dimensions 5

5 by 1 2 m (18 0 by 3

9 ft) with a mass of around 18 metric tons; it is New Hampshire's state mineral

Crystal Structure: Beryl has a hexagonal crystal structure, meaning it has six-fold rotational symmetry around its vertical axis. This crystal structure forms prismatic, elongated hexagonal crystals with a well-defined basal cleavage.
Crystallography of beryl
Crystallography of beryl

Rare variety of beryl

Red beryl, formerly known as bixbite and marketed as red emerald or scarlet emerald, is an extremely rare variety of beryl as well as one of the rarest minerals on Earth.
The gem gets its red color from manganese ions embedded inside of beryllium aluminium cyclosilicate crystals.
The color of red beryl is stable up to 1,000 °C (1,830 °F).
Red Beryl can come in various tints like strawberry, bright ruby, cherry, and orange.

Categories

Protein crystallography beamline
Neutron crystallography beam
Synchrotron crystallography beamline
Neutron crystallography beamline
Crystallography cell
Crystallography cell membrane
Celebrating crystallography
Crystallographic cell
Crystallographic cell unit
Inversion center crystallography
Reduced cell crystallography
Crystallography of cellulose
Crystallography dewar
Crystallography description
Crystallography design meaning
Crystallography fellowship
Crystallography features
Femtosecond crystallography
Fedorov crystallography
Crystallographic feature