സിലിക്ക

സിലിക്ക
Names
	IUPAC name Silicon dioxide
	Other names Quartz; Silica; Silicic oxide; Silicon(IV) oxide; Crystalline silica; Pure Silica; Silicea; Silica sand;
Identifiers
CAS number	7631-86-9
PubChem	24261
EC number	231-545-4
KEGG	C16459
MeSH	Silicon+dioxide
ChEBI	30563
RTECS number	VV7565000
Gmelin Reference	200274
ChemSpider ID	22683
Properties
തന്മാത്രാ വാക്യം
Molar mass	0 g mol−1
Appearance	Transparent solid (Amorphous) White/Whitish Yellow (Powder/Sand)
സാന്ദ്രത	2.648 (α-quartz), 2.196 (amorphous) g·cm−3
ദ്രവണാങ്കം
ക്വഥനാങ്കം
Magnetic susceptibility (χ)	−29.6·10−6 cm3/mol
Thermal conductivity	12 (\|\| c-axis), 6.8 (⊥ c-axis), 1.4 (am.) W/(m⋅K)
Refractive index (nD)	1.544 (o), 1.553 (e)
Hazards
	NIOSH (US health exposure limits):
PEL (Permissible)	TWA 20 mppcf (80 mg/m3/%SiO2) (amorphous)
REL (Recommended)	TWA 6 mg/m3 (amorphous); Ca TWA 0.05 mg/m3
IDLH (Immediate danger)	3000 mg/m3 (amorphous); Ca [25 mg/m3 (cristobalite, tridymite); 50 mg/m3 (quartz)]
Thermochemistry
Std enthalpy of; formation ΔfHo298	−911 kJ·mol−1
Standard molar; entropy So298	42 J·mol−1·K−1
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
	verify (what is: /?)
	Infobox references

വെളുത്തതും സിലിക്ക സമ്പുഷ്ടവുമായ മണലിനെ ആണ് സിലിക്ക മണൽ എന്ന് വിളിക്കുന്നത് കേരളത്തിലെ ആലപ്പുഴ പള്ളിപ്പുറം പ്രദേശം സിലിക്ക മണലിനാൽ സമ്പുഷ്ടമാണ്. ഗ്ലാസ് നിർമ്മാണത്തിന് പ്രധാനമായി ഉപയോഗിക്കുന്നു

https://en.wikipedia.org/wiki/Silicon_dioxide

അവലംബം തിരുത്തുക

↑ ^1.0 ^1.1 ^1.2 ^1.3 Haynes, William M., സംശോധാവ്. (2011). CRC Handbook of Chemistry and Physics (92nd പതിപ്പ്.). Boca Raton, FL: CRC Press. ISBN 1439855110.
↑ ^2.0 ^2.1 ^2.2 "NIOSH Pocket Guide to Chemical Hazards #0552". National Institute for Occupational Safety and Health (NIOSH).
↑ ^3.0 ^3.1 "NIOSH Pocket Guide to Chemical Hazards #0682". National Institute for Occupational Safety and Health (NIOSH).
↑ ^4.0 ^4.1 Zumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. പുറം. A22. ISBN 978-0-618-94690-7.

പുറംകണ്ണികൾ തിരുത്തുക

Chisholm, Hugh, സംശോധാവ്. (1911). "Silica" . എൻസൈക്ലോപീഡിയ ബ്രിട്ടാനിക്ക (11th പതിപ്പ്.). കേംബ്രിഡ്ജ് സർവകലാശാല പ്രസ്സ്.
Tridymite, International Chemical Safety Card 0807
Quartz, International Chemical Safety Card 0808
Cristobalite, International Chemical Safety Card 0809
amorphous, NIOSH Pocket Guide to Chemical Hazards
crystalline, as respirable dust, NIOSH Pocket Guide to Chemical Hazards
Formation of silicon oxide layers in the semiconductor industry. LPCVD and PECVD method in comparison. Stress prevention.
Quartz SiO₂ piezoelectric properties
Silica (SiO₂) and Water
Epidemiological evidence on the carcinogenicity of silica: factors in scientific judgement by C. Soutar and others. Institute of Occupational Medicine Research Report TM/97/09
Scientific opinion on the health effects of airborne silica by A Pilkington and others. Institute of Occupational Medicine Research Report TM/95/08
The toxic effects of silica Archived 2016-04-15 at the Wayback Machine. by A Seaton and others. Institute of Occupational Medicine Research Report TM/87/13
Structure of precipitated silica Archived 2015-07-15 at the Wayback Machine.

[b92-1] 1.0 ^1.1 ^1.2 ^1.3 Haynes, William M., സംശോധാവ്. (2011). CRC Handbook of Chemistry and Physics (92nd പതിപ്പ്.). Boca Raton, FL: CRC Press. ISBN 1439855110.

[PGCH0552-2] 2.0 ^2.1 ^2.2 "NIOSH Pocket Guide to Chemical Hazards #0552". National Institute for Occupational Safety and Health (NIOSH).

[PGCH0682-3] 3.0 ^3.1 "NIOSH Pocket Guide to Chemical Hazards #0682". National Institute for Occupational Safety and Health (NIOSH).

[b1-4] 4.0 ^4.1 Zumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. പുറം. A22. ISBN 978-0-618-94690-7.

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Names

IUPAC name Silicon dioxide
Other names Quartz Silica Silicic oxide Silicon(IV) oxide Crystalline silica Pure Silica Silicea Silica sand
Identifiers
CAS number	7631-86-9
PubChem	24261
EC number	231-545-4
KEGG	C16459
MeSH	Silicon+dioxide
ChEBI	30563
RTECS number	VV7565000
Gmelin Reference	200274
ChemSpider ID	22683
Properties
തന്മാത്രാ വാക്യം
Molar mass	0 g mol⁻¹
Appearance	Transparent solid (Amorphous) White/Whitish Yellow (Powder/Sand)
സാന്ദ്രത	2.648 (α-quartz), 2.196 (amorphous) g·cm⁻³^[1]
ദ്രവണാങ്കം
ക്വഥനാങ്കം
Magnetic susceptibility (χ)	−29.6·10⁻⁶ cm³/mol
Thermal conductivity	12 (\|\| c-axis), 6.8 (⊥ c-axis), 1.4 (am.) W/(m⋅K)^[1]^(p12.213)
Refractive index (n_D)	1.544 (o), 1.553 (e)^[1]^(p4.143)
Hazards
NIOSH (US health exposure limits):
PEL (Permissible)	TWA 20 mppcf (80 mg/m³/%SiO₂) (amorphous)^[2]
REL (Recommended)	TWA 6 mg/m³ (amorphous)^[2] Ca TWA 0.05 mg/m³^[3]
IDLH (Immediate danger)	3000 mg/m³ (amorphous)^[2] Ca [25 mg/m³ (cristobalite, tridymite); 50 mg/m³ (quartz)]^[3]
Thermochemistry
Std enthalpy of formation Δ_fH^o₂₉₈	−911 kJ·mol⁻¹^[4]
Standard molar entropy S^o₂₉₈	42 J·mol⁻¹·K⁻¹^[4]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is: Y/N?)
Infobox references