Mineralogical term for the visible shape of a mineral
This article is about the descriptive term used in mineralogy. For the addictive drug, see crystal methamphetamine.
Smoky quartz with spessartine on top of feldspar matrix, featuring different crystal habits (shapes)
In mineralogy, crystal habit is the characteristic external shape of an individual crystal or aggregate of crystals. The habit of a crystal is dependent on its crystallographic form and growth conditions, which generally creates irregularities due to limited space in the crystallizing medium (commonly in rocks).[1][2]
^Klein, Cornelis, 2007, Minerals and Rocks: Exercises in Crystal and Mineral Chemistry, Crystallography, X-ray Powder Diffraction, Mineral and Rock Identification, and Ore Mineralogy, Wiley, third edition, ISBN 978-0471772774
^Wenk, Hans-Rudolph and Andrei Bulakh, 2004, Minerals: Their Constitution and Origin, Cambridge, first edition, ISBN 978-0521529587
mineralogy, crystalhabit is the characteristic external shape of an individual crystal or aggregate of crystals. The habit of a crystal is dependent...
or to lack obvious crystal faces altogether and appear massive. Well-formed crystals typically form as a druse (a layer of crystals lining a void), of...
minerals, except in the prism-zone of 45° and 90°. The common octahedral crystalhabit of anatase, with four perfect cleavage planes, has an angle over its...
pyrite is naturally n-type, in both crystal and thin-film forms, potentially due to sulfur vacancies in the pyrite crystal structure acting as n-dopants. During...
industry) and increase carbonation. Furthermore, due to its particular crystalhabit, such as rhombohedron, hexagonal prism, etc., it promotes the production...
(needle-like) and fibrous aggregations. It has nearly the same angles between the crystal faces as does natrolite, but natrolite is orthorhombic and scolecite is...
Beryl belongs to the hexagonal crystal system. Normally beryl forms hexagonal columns but can also occur in massive habits. As a cyclosilicate beryl incorporates...
There is little solubility between these minerals due to different crystalhabit and inability of substitution between alkali elements and ferro-magnesian...
mineral (natural) form of sodium chloride (NaCl). Halite forms isometric crystals. The mineral is typically colorless or white, but may also be light blue...
Diamond is a solid form of the element carbon with its atoms arranged in a crystal structure called diamond cubic. Another solid form of carbon known as graphite...
composition and crystal structure, the description of a mineral species usually includes its common physical properties such as habit, hardness, lustre...
of multiple open or closed forms. A crystal'shabit is its visible external shape. This is determined by the crystal structure (which restricts the possible...
based on relative humidity. Chalcophyllite crystallizes in the trigonal crystal class, 3 2/m with space group R 3m or 3 with space group R 3. Some authors...
of fluoroedenite. Edenite is a member of the monoclinic crystal system and is in the crystal class 2/m (space group C2/m). This means crystalline edenite...
of green and violet paints. Black, manganese oxides with a dendritic crystalhabit often found on fracture or rock surfaces are often assumed to be pyrolusite...
iron pyrite which can lead to acid mine drainage.[citation needed] The crystalhabit, hardness, density, and garlic odour when struck are diagnostic. Arsenopyrite...
almost complete transparency to an almost-opaque brownish-gray or black crystals. The color of smoky quartz is produced when natural radiation, emitted...
crystal structure, which named after the mineral. This structure is a member of the hextetrahedral crystal class (space group F43m). In the crystal structure...
synthetically in laboratories for industrial or decorative purposes in large crystal boules. Because of the remarkable hardness of sapphires – 9 on the Mohs...
1893. At first, he mistakenly identified the crystals as diamonds, but in 1904 he identified the crystals as silicon carbide. Artificial silicon carbide...
a material is described by polymorphism and other variables such as crystalhabit, amorphous fraction or crystallographic defects. Polymorphs have different...
gold. Quality grading is according to coloration and the typical mineral crystal configuration in the stone. Larimar also comes in green and can have red...
this use is limited by its rarity, which is compounded by its poor crystalhabit. These factors make eudialyte of primary interest as a collector's mineral...
includes true fivefold rotation axes. The name crystal pyrite comes from one of the two common crystalhabits shown by pyrite (the other one being the cube)...
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