QUARTZ

CAS NO:14808-60-7
EC NO:215-684-8

Quartz is a chemical compound comprised of oxide and silicon elements. 
Quartz is insoluble in water or acids except hydrofluoric acid. 
Quartz appears as transparent to gray, tasteless crystal which is widely presented in nature as sand or quartz. 
Quartz is also one of the most abundant mineral existing in Earth’s crust. 
Quartz has wide applications in various fields as below: 
(1) as the precursor to glass and silicon; 
(2) for sand casting; 
(3) as a additive to food and pharmaceutical products; 
(4) for production of cement and refractory materials; 
(5) as the medium for conversion of energy. 
(6) Extraction of DNA and RNA; 
(7) as a defoamer component. There are many ways for production of silicon. The most common way is through mining and purification of quartz.

Quartz, generally known as silica, is a colorless solid that exists in numerous crystalline forms, the most common of which is quartz. 
Oxygen and Quartz are the two most common elements in the earth’s crust, and Quartz is the principal component of sand. 
Quartz is used biologically, most notably by phytoplanktonic diatoms and the zooplankton radiolarians in their shells. The words silica and silicon come from the Latin silex meaning hard stone or fl int. 
Quartz should not be confused with silicates or silicones. 
Quartz contain the basic tetrahedral unit SiO4 4- bonded to metal ions such as aluminum, iron, sodium, magnesium, calcium, and potassium to form numerous silicate minerals. Silicones are synthetic polymers made of monomers with at least two silicon atoms combined with an organic group and generally containing oxygen.

Appearance :Powder
Physical State :Solid
Solubility :Soluble in HF, and alkalies (very slightly). Insoluble in water, and acids.
Storage :Store at room temperature
Melting Point :1610° C (lit.)
Boiling Point :2230° C (lit.)
Density :2.6 g/cm3 at 25° C (lit.)
Refractive Index :n20D 1.54 (lit.)

Chemical Properties    
granular abrasive solid of varied colour, depending upon other

Chemical Properties    
Silicon dioxide/crystalline silica is a component of many mineral dusts and materials which melts to a glass at very high temperature.

Occurrence    
Quartz is the mineral quartz, oxide of the nonmetallic element silicon, is the commonest of minerals, and appears in a greater number of forms than any other. Quartzs formula is SiO2. 
Quartz commonly occurs in prismatic hexagonal crystals terminated by a pyramid. This pyramid is due to the equal development of two rhombohedrons, and may be observed in cases where one rhombohedron predominates. Cleavage is not observed; the fracture is typically conchoidal; hardness is 7; specific gravity, 2.65; luster, vitreous to greasy or dull; colorless to white, pink, purple, yellow, blue, green, smoky brown to nearly black; transparent to opaque.

Uses    
Quartz is an anticaking agent, carrier, and dispersant that can absorb approximately 120% of its weight and remain free flowing. 
Quartz is used in salt, flours, and powdered soups to prevent caking caused by moisture. 
Quartz is also used in powdered coffee whitener, vanilla powder, baking powder, dried egg yolk, and tortilla chips. the usage level ranges from 1 to 2%. it is also termed silica, amorphous.

Uses    
Electronic components; piezoelectric control in filters, oscillators, frequency standards, wave filters, radio and TV components; barrel-finishing abra- sive.

Uses    
Formulators may select Quartz as an alternative to diatomaceous earth or clay, particularly when developing mineral make-up, pressed or loose powders. 
Quartz has abrasive, absorbent, and anti-caking properties, and can also reduce the transparency of a formulation. 
Quartz is the u.S. name for what is known as solum diatomeae.

Uses    
As the art of glass making developed, individuals discovered how to produce different glasses by adding various substances to the silica melt. The addition of calcium strengthened the glass, and other substances imparted color to the glass. Iron and sulfur give brown glass, copper produces a light blue color, and cobalt a dark blue color. Manganese was added to produce a transparent glass, and antimony to clear the glass of bubbles. Most modern glass produced is soda-lime glass and consists of approximately 70% SiO2, 15% Na2O (soda), and 5% CaO (lime). Borosilicate glass is produced by adding about 13% B2O3. Borosilicate glass has a low coeffi cient of thermal expansion and is therefore very heat resistant. 
Quartz is used extensively in laboratory glassware and in cooking where it is sold under the brand name Pyrex. Because of silica's high melting point, it is ideal for making molds for metal casting. 
Quartz is regularly used to form iron, aluminum, and copper items. 
Quartz is the primary filter medium used in wastewater treatment. Filtration systems often modify silica physically and chemically to produce activated silica formulations. Besides water treatment, activated silica gels used for chromatography in chemistry laboratories. In the construction industry, silica glass is used as fiber glass insulation, silica sand is a basic ingredient in cement and concrete, and is used indirectly in building products. Silica is used as filler in paints, adhesives, rubber, and coatings. 
Quartz is added to personal care products such as tooth polishes.

Definition    
A natural crystalline form of silica (SiO2).

Definition    
A purple form of the mineral quartz (silicon(IV) oxide, SiO2) used as a semiprecious gemstone. The color comes from impurities such as oxides of iron.

Definition agate: 
A variety of chalcedony thatforms in rock cavities and has a patternof concentrically arranged bandsor layers that lie parallel to the cavitywalls. These layers are frequently alternatingtones of brownish-red.
Moss agate does not show the samebanding and is a milky chalcedonycontaining mosslike or dendritic patternsformed by inclusions of manganeseand iron oxides. Agates areused in jewellery and for ornamentalpurposes.

About this substance
Helpful information
Quartz is registered under the REACH Regulation but is not currently being manufactured in and / or imported to the European Economic Area.

Quartz is used at industrial sites.

Consumer Uses
ECHA has no public registered data indicating whether or in which chemical products the substance might be used. ECHA has no public registered data on the routes by which this substance is most likely to be released to the environment.

Article service life
ECHA has no public registered data on the routes by which this substance is most likely to be released to the environment. ECHA has no public registered data indicating whether or into which articles the substance might have been processed.

Widespread uses by professional workers
ECHA has no public registered data indicating whether or in which chemical products the substance might be used. ECHA has no public registered data on the types of manufacture using this substance. ECHA has no public registered data on the routes by which this substance is most likely to be released to the environment.

Formulation or re-packing
ECHA has no public registered data indicating whether or in which chemical products the substance might be used. ECHA has no public registered data on the routes by which this substance is most likely to be released to the environment.

Uses at industrial sites
ECHA has no public registered data indicating whether or in which chemical products the substance might be used. This substance is used in the following areas: scientific research and development.
ECHA has no public registered data on the routes by which this substance is most likely to be released to the environment.

Manufacture
ECHA has no public registered data on the routes by which this substance is most likely to be released to the environment.

Quartz has historically been called amorphous. A naturally occurring microcrystalline silica which has been finely ground. 
Quartz is formed when silicon is exposed to oxygen. Employed in the extraction of DNA and RNA due to its ability to bind to the nucleic acids under the presence of chaotropes.

Quartz, is an oxide of silicon with the chemical formula SiO2, most commonly found in nature as quartz and in various living organisms. In many parts of the world, Quartz is the major constituent of sand. 
Quartz is one of the most complex and most abundant families of materials, existing as a compound of several minerals and as a synthetic product. Notable examples include fused quartz, fumed silica, silica gel, and aerogels. 
Quartz is used in structural materials, microelectronics (as an electrical insulator), and as components in the food and pharmaceutical industries.

Formula: SiO2
Molecular mass: 60.1
Boiling point: 2230°C
Melting point: 1610°C
Density: 2.6 g/m³
Solubility in water: none 

Features:

Quartz in water belongs to SiO2, Colloid in water. Odorless, tasteless and odorless.

-With the material does not affect the natural color, only 10-20nm due to the album colloids, and there are large-size surfaces in general, and they are colorless and transparent.

-No GOOD partitionandtime can be confused with other partitions in a small place.

-This is a proprietor. Quartz of grains formed by the evaporation of moisture, remaining attached to the living plant, and together with the balloon.

Application:

Quartz has high bond strength and high heat performance (1500-1600℃), used for various fireproof goods as adhesive agent. 
Quartz is used for coating. 
Quartz can also be anti-fouling, dust-clean, anti-aging, fireproof, etc. In addition, Quartz can be used in making thin covers, casting, industrial, factory industry, textile manufacturing industry sizing agent and storage agent of silicon steels.

Quartz is a natural compound of silicon and oxygen found mostly in sand, Quartz has three main crystalline varieties: quartz, tridymite, and cristobalite. Fine particulate silica dust from quartz rock causes over a long-term progressive lung injury, silicosis. 

Quartz is another name for the chemical compound composed of silicon and oxygen with the chemical formula SiO2, or Quartz. There are many forms of silica. All silica forms are identical in chemical composition, but have different atom arrangements. 

Quartz is a silicon oxide made up of linear triatomic molecules in which a silicon atom is covalently bonded to two oxygens.

Silica refers to a mixture of tripoli, silica crystal, quartz, etc. Industrial sand and gravel, often called "silica," "silica sand," and "quartz sand," includes sands and gravels with high silicon dioxide (SiO2) content.  These sands are used in glassmaking; for foundry, abrasive, and hydraulic fracturing (frac) applications; and for many other industrial uses.   
The specifications for each use vary, but silica resources for most uses are abundant.  
In almost all cases, silica mining uses open pit or dredging mining methods with standard mining equipment.  
Except for temporarily disturbing the immediate area while mining operations are active, sand and gravel mining usually has limited environmental impact.

Industry Uses    
Fillers
Paint additives and coating additives not described by other categories
Processing aids, not otherwise listed
Abrasives
Adhesives and sealant chemicals 
Fillers
Finishing agents
Intermediates
Paint additives and coating additives not described by other categories
Pigments
Processing aids, not otherwise listed
Processing aids, specific to petroleum production
Adhesives and sealant chemicals
Cement
Fillers
Intermediates
Pigments
Refractories
Refractory Materials
Refractory materials
raw material for cement manufacturing
Adsorbents and absorbents
Fillers
Solids separation agents

Consumer Uses    
Building/construction materials not covered elsewhere
Paints and coatings
Adhesives and sealants
Automotive care products
Building/construction materials not covered elsewhere
Fabric, textile, and leather products not covered elsewhere
Furniture and furnishings not covered elsewhere
Manufactured abrasives and polishes for the use of semi-conductors.
Paints and coatings
Plastic and rubber products not covered elsewhere
Adhesives and sealants
Automotive care products
Building/construction materials not covered elsewhere
High temperature refractories for furnace linings.
Paints and coatings
Plastic and rubber products not covered elsewhere
Desiccant
Non-TSCA use
Paints and coatings
Water treatment products

Industry Processing Sectors
Adhesive manufacturing
All other basic organic chemical manufacturing
Computer and electronic product manufacturing
Electrical equipment, appliance, and component manufacturing
Mining (except oil and gas) and support activities
Oil and gas drilling, extraction, and support activities
Paint and coating manufacturing
Plastics product manufacturing
Synthetic dye and pigment manufacturing
Synthetic rubber manufacturing
Textiles, apparel, and leather manufacturing
Transportation equipment manufacturing
All other chemical product and preparation manufacturing
Construction
Nonmetallic mineral product manufacturing (includes clay, glass, cement, concrete, lime, gypsum, and other nonmetallic mineral product manufacturing.
Paint and coating manufacturing
Synthetic rubber manufacturing
Transportation equipment manufacturing

Quartz is a frequently occurring solid component of most natural mineral dusts.

Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The atoms are linked in a continuous framework of SiO4 silicon-oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO2. 
Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar.

Quartz exists in two forms, the normal α-quartz and the high-temperature β-quartz, both of which are chiral. The transformation from α-quartz to β-quartz takes place abruptly at 573 °C (846 K; 1,063 °F). Since the transformation is accompanied by a significant change in volume, it can easily induce fracturing of ceramics or rocks passing through this temperature threshold.

There are many different varieties of quartz, several of which are classified gemstones. Since antiquity, varieties of quartz have been the most commonly used minerals in the making of jewelry and hardstone carvings, especially in Eurasia.

Quartz is the mineral defining the value of 7 on the Mohs scale of hardness, a qualitative scratch method for determining the hardness of a material to abrasion.

Quartz is a defining constituent of granite and other felsic igneous rocks. 
Quartz is very common in sedimentary rocks such as sandstone and shale. 
Quartz is a common constituent of schist, gneiss, quartzite and other metamorphic rocks.
Quartz has the lowest potential for weathering in the Goldich dissolution series and consequently it is very common as a residual mineral in stream sediments and residual soils. Generally a high presence of quartz suggests a "mature" rock, since it indicates the rock has been heavily reworked and quartz was the primary mineral that endured heavy weathering.

Not all varieties of quartz are naturally occurring. Some clear quartz crystals can be treated using heat or gamma-irradiation to induce color where it would not otherwise have occurred naturally. Susceptibility to such treatments depends on the location from which the quartz was mined.

Prasiolite, an olive colored material, is produced by heat treatment; natural prasiolite has also been observed in Lower Silesia in Poland. Although citrine occurs naturally, the majority is the result of heat-treating amethyst or smoky quartz. Carnelian has been heat-treated to deepen its color since prehistoric times.

Because natural quartz is often twinned, synthetic quartz is produced for use in industry. Large, flawless, single crystals are synthesized in an autoclave via the hydrothermal process.

Like other crystals, quartz may be coated with metal vapors to give it an attractive sheen.

Pure quartz, traditionally called rock crystal or clear quartz, is colorless and transparent or translucent, and has often been used for hardstone carvings, such as the Lothair Crystal. Common colored varieties include citrine, rose quartz, amethyst, smoky quartz, milky quartz, and others. These color differentiations arise from the presence of impurities which change the molecular orbitals, causing some electronic transitions to take place in the visible spectrum causing colors.

Quartz; Quartz is the most abundant silica mineral. 
Pure Quartz is colorless and transparent. 
Quartz occurs in most igneous and practically all metamorphic and sedimentary rocks. 
Quartz is used as a component of numerous industrial materials. 
Quartz is the second most abundant mineral in the Earth's crust. 
Quartz is a clear, glossy mineral with a hardness of 7 on the MOHS scale.
Quartz is the second most common mineral in Earth’s crust. 
Quartzs chemical name is SiO2. 
Although quartz is common, it is usually twinned so industries often Silica; Also known as the silicon dioxide, has a white powdery substance solid. 
Quartz is used in production in many products such as glass, food additive and raw material for production.

Silica (quartz): Quartz, is a chemical compound that is composed of one silicon atom and two oxygen atoms. 
Quartz appears naturally in several crystalline forms, one of which is quartz.

Quartz is the most common mineral on the face of the Earth. 
Quartz is found in nearly every geological environment and is at least a component of almost every rock type. 
Quartz frequently is the primary mineral, >98%. 
Quartz is also the most varied in terms of varieties, colors and forms. This variety comes about because of the abundance and widespread distribution of quartz. A collector could easily have hundreds of quartz specimens and not have two that are the same due to the many broad categories. 
Quartz is not the only mineral composed of SiO2. There are no less than eight other known structures that are composed of SiO2. 

Quartz has a unique structure. Actually, there is another mineral that shares quartz's structure, and it is not even a silicate. 
Quartz is a rare phosphate named berlinite, AlPO4, that is isostructural with quartz.

Quartz is a fun mineral to collect. 
Quartzs abundance on the Earth's surface is incredible and produces some wonderful varieties that don't even look like the same mineral.

Color is as variable as the spectrum, but clear quartz is by far the most common color followed by white or cloudy (milky quartz). Purple (Amethyst), pink (Rose Quartz), gray or brown to black (Smoky Quartz) are also common. Cryptocrystalline varieties can be multicolored.

Quartz, widely distributed mineral of many varieties that consists primarily of silica, or silicon dioxide (SiO2). Minor impurities such as lithium, sodium, potassium, and titanium may be present. 
Quartz has attracted attention from the earliest times; water-clear crystals were known to the ancient Greeks as krystallos—hence the name crystal, or more commonly rock crystal, applied to this variety. The name quartz is an old German word of uncertain origin first used by Georgius Agricola in 1530.

Quartz has great economic importance. Many varieties are gemstones, including amethyst, citrine, smoky quartz, and rose quartz.

Quartz is the second most abundant mineral in Earth’s crust after feldspar. 
Quartz occurs in nearly all acid igneous, metamorphic, and sedimentary rocks. 
Quartz is an essential mineral in such silica-rich felsic rocks as granites, granodiorites, and rhyolites. 
Quartz is highly resistant to weathering and tends to concentrate in sandstones and other detrital rocks. Secondary quartz serves as a cement in sedimentary rocks of this kind, forming overgrowths on detrital grains. Microcrystalline varieties of silica known as chert, flint, agate, and jasper consist of a fine network of quartz. Metamorphism of quartz-bearing igneous and sedimentary rocks typically increases the amount of quartz and its grain size.

IUPAC names
Bentoniitti
calcium carbonate
Cristalline Silica
CRYSTALLINE SILICA
Crystalline silica
crystalline silica
Crystalline silica
diossido di silicio
dioxilane
Dioxosilane
dioxosilane
křemen
N/A
O2Si
Quanz - crystalline silica
Quartz
quartz
Quartz (respirable quartz fraction ≥ 10%)
quartz (silicone dioxide)
QUARTZ (SIO2)
Quartz (SiO2)
quartz (SiO2)
QUARTZ / SAND
QUARTZ SILICA
Quartz Silica
QUARTZ, CRYSTALLINE SILICA
Quarz (SiO2)
silanedione
Silica
silica crystalline
Silica crystalline quartz
silica crystalline – quartz
Silica, crystalline - quartz
silica, crystalline - quartz
Silica, crystalline quartz
silica, crystalline quartz
Silica, quartz
silicium dioxide
Siliciumdioxide
Silicon Dioxide
Silicon dioxide
silicon dioxide
SILICON DIOXIDE (QUARTZ)
Silicon dioxide (Quartz)
Silicon dioxide (quartz)
silicon dioxide (quartz)
SILICON OXIDE
Silicon oxide
Silicone dioxide (Quartz)
Silicone dioxide (quartz)
unknown

SYNONYMS:
Quartz (SiO2)
Rose quartz
silica,crystalline(asrespirable
silica,crystalline(asrespirabledust)
Silicon oxide, quartz
P 820 A
QUARTZ, CRYSTAL LASER GRADE
QUARTZ CALIBRATION PLATE 17°
QUARTZ, STONE 99.9%
QUARTZ CALIBRATION PLATE 34°
QUARTZ MICROFIBRE FILTER CIRCLES WHATMAN QM-A 3.7CM DIA BOX 100
FUSED QUARTZ BLOCK 99.00% 0-50MM
QUARTZ BLOCK FUSED, 99%
QUARTZ, POWDER FUSED
QUARTZ, WAFER SURFACE ACOUSTIC WAVE (SAW)
QUARTZ, POWDER 20-40 MESH ( WASHED)
QUARTZ CALIBRATION PLATE 8.5°
FUSED QUARTZ BLOCK 99.99% 0-50MM
QUARTZ BLOCK FUSED, 99.99%
CRYSTALLINESILICA
MIN-U-SIL
CRYSTALLINEQUARTZ
DQ12
ALPHA-QUARTZSILICA
MIN-U-SIL10
NANOALPHA-QUARTZPARTICLES
MIN-U-SIL15
AGATE
QUARTZFQ
NOVACULITE
RESPIRABLEQUARTZ
FINEALPHA-QUARTZPARTICLES
WHETSTONEDUST
AMETHYST
QUARTZPARTICLES
QUARTZDQ12
MIN-U-SIL5
DQ12QUARTZ
QUARTZDQ
AGATEDUST
Wide Pore Micro-spherical Silica Gel
Blue SG
Macro-pored Micro-spherical SG
SG Type B
SILICONE OXIDE
92553, Quartz (particle size 1400-5000 m icrons)
SAND, WHITE QUARTZ, -50+70 MESH, SUITABL E FOR CHROMATOGRAPHY
93561, Quartz (particle size 14-90 micro ns)
74620, Quartz (particle size 160-630 mi crons)
52885, Quartz (particle size 2.40-32.00 microns)
79598, Quartz (2.50 m2/g) (nitrogen BET specific surface area)
91577, Quartz (particle size 480-1800 mi crons)
QUARTZ, SAND, ACID PURIFIED, 40-100 MESH
75558, Quartz (particle size 1.20-20.00 microns)