フッ化カルシウム
WordNet
- a white metallic element that burns with a brilliant light; the fifth most abundant element in the earths crust; an important component of most plants and animals (同)Ca, atomic number 20
- a salt of hydrofluoric acid
PrepTutorEJDIC
- 『カルシウム』(金属元素;化学記号は『Ca』)
- フッ化物
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2014/09/12 15:41:27」(JST)
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| Calcium fluoride |
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| Identifiers |
| CAS number |
7789-75-5 Y |
| PubChem |
24617 |
| ChemSpider |
23019 Y |
| UNII |
O3B55K4YKI Y |
| EC number |
232-188-7 |
| ChEBI |
CHEBI:35437 Y |
| RTECS number |
EW1760000 |
| Jmol-3D images |
Image 1 |
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InChI=1S/Ca.2FH/h;2*1H/q+2;;/p-2 Y
Key: WUKWITHWXAAZEY-UHFFFAOYSA-L Y
InChI=1/Ca.2FH/h;2*1H/q+2;;/p-2
Key: WUKWITHWXAAZEY-NUQVWONBAZ
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| Properties |
| Molecular formula |
CaF2 |
| Molar mass |
78.07 g mol−1 |
| Appearance |
White crystalline solid (single crystals are transparent) |
| Density |
3.18 g/cm3 |
| Melting point |
1,418 °C (2,584 °F; 1,691 K) |
| Boiling point |
2,533 °C (4,591 °F; 2,806 K) |
| Solubility in water |
0.0015 g/100 mL (18 °C)
0.0016 g/100 mL (20 °C) |
| Solubility product, Ksp |
3.9 × 10−11 [1] |
| Solubility |
insoluble in acetone
slightly soluble in acid |
| Refractive index (nD) |
1.4338 |
| Structure |
| Crystal structure |
cubic crystal system, cF12[2] |
| Space group |
Fm3m, #225 |
Coordination
geometry |
Ca, 8, cubic
F, 4, tetrahedral |
| Hazards |
| EU Index |
Not listed |
| R-phrases |
R20, R22, R36, R37, R38 |
| S-phrases |
S26, S36 |
| Main hazards |
Reacts with conc. sulfuric acid to produce hydrofluoric acid |
| NFPA 704 |
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| Flash point |
Non-flammable |
| LD50 |
4250 mg/kg (oral, rat) |
| Related compounds |
| Other anions |
Calcium chloride
Calcium bromide
Calcium iodide |
| Other cations |
Beryllium fluoride
Magnesium fluoride
Strontium fluoride
Barium fluoride |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa) |
| Y (verify) (what is: Y/N?) |
| Infobox references |
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Calcium fluoride is the inorganic compound with the formula CaF2. It is a colourless insoluble solid. It occurs as the mineral fluorite (also called fluorspar), which is often deeply coloured owing to impurities.
Contents
- 1 Chemical structure
- 2 Preparation
- 3 Applications
- 4 Safety
- 5 References
- 6 See also
- 7 External links
Chemical structure
The compound crystallizes in a cubic motif. Ca2+ centres are eight-coordinate, being centered in a "box" for eight F− centres. Each F− centre is coordinated to four Ca2+ centre.[3] Although perfectly packed crystalline samples are colorless, the mineral is often deeply colored due to the presence of F-centers.
Preparation
The mineral fluorspar is abundant, widespread, and mainly of interest as a precursor to HF. Thus, little motivation exists for the industrial production of CaF2. High purity CaF2 is produced by treating calcium carbonate with hydrofluoric acid:[4]
- CaCO3 + 2 HF → CaF2 + CO2 + H2O
Applications
Main article: fluorite
Naturally occurring CaF2 is the principal source of hydrogen fluoride, a commodity chemical used to produce a wide range of materials. Calcium fluoride in the fluorite state is of significant commercial importance as a fluoride source.[5] Hydrogen fluoride is liberated from the mineral by the action of concentrated sulfuric acid:[6]
- CaF2 + H2SO4 → CaSO4(solid) + 2 HF
Safety
CaF2 is classified "not dangerous." With regards to inhalation, the NIOSH-recommended concentration of fluorine-containing dusts is 2.5 mg/m3 in air.[4]
References
- ^ Pradyot Patnaik. Handbook of Inorganic Chemicals. McGraw-Hill, 2002, ISBN 0-07-049439-8
- ^ X-ray Diffraction Investigations of CaF2 at High Pressure, L. Gerward, J. S. Olsen, S. Steenstrup, M. Malinowski, S. Åsbrink and A. Waskowska, Journal of Applied Crystallography (1992), 25, 578-581 doi:10.1107/S0021889892004096
- ^ G. L. Miessler and D. A. Tarr “Inorganic Chemistry” 3rd Ed, Pearson/Prentice Hall publisher, ISBN 0-13-035471-6.
- ^ a b Aigueperse, Jean; Paul Mollard, Didier Devilliers, Marius Chemla, Robert Faron, Renée Romano, Jean Pierre Cuer (2005), "Fluorine Compounds, Inorganic", Ullmann's Encyclopedia of Industrial Chemistry, Weinheim: Wiley-VCH, doi:10.1002/14356007.a11_307
- ^ Aigueperse, Jean; Mollard, Paul; Devilliers, Didier; Chemla, Marius; Faron, Robert; Romano, Renée; Cuer, Jean Pierre (2005), "Fluorine Compounds, Inorganic", Ullmann's Encyclopedia of Industrial Chemistry, Weinheim: Wiley-VCH, p. 307, doi:10.1002/14356007.a11_307.
- ^ Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.
See also
- List of laser types
- Photolithography
Related materials
- Barium fluoride
- Magnesium fluoride
- Calcium chloride
External links
- NIST webbook thermochemistry data
- Uranium doped CaF2 laser (pdf file)
- Charles Townes on the history of lasers
- National Pollutant Inventory - Fluoride and compounds fact sheet
- Crystran Material Data
- MSDS (University of Oxford)
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Calcium compounds
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- CaAl2O4
- CaB6
- CaBr2
- Ca(BrO3)2
- CaC2
- CaCN2
- Ca(CN)2
- CaCO3
- CaC2O4
- CaCl2
- Ca(ClO)2
- Ca(ClO3)2
- CaCrO4
- CaF2
- CaH2
- Ca(HCO3)2
- CaH2S2O6
- CaI2
- Ca(IO3)2
- Ca(MnO4)2
- CaN6
- Ca(NO3)2
- CaO
- CaO2
- Ca(OH)2
- CaP
- CaS
- CaSO3
- CaSO4
- CaSi2
- CaTiO3
- Ca2P2O7
- Ca2SiO4
- Ca3Al2O6
- Ca3(AsO4)2
- Ca3(BO3)2
- Ca3(C6H5O7)2
- Ca3N2
- Ca3P2
- Ca3(PO4)2
- Ca(H2PO4)2
- CaHPO4
- C36H70CaO4
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UpToDate Contents
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English Journal
- Increased lysosomal biogenesis in activated microglia and exacerbated neuronal damage after traumatic brain injury in progranulin-deficient mice.
- Tanaka Y, Matsuwaki T, Yamanouchi K, Nishihara M.SourceDepartment of Veterinary Physiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan.
- Neuroscience.Neuroscience.2013 Oct 10;250:8-19. doi: 10.1016/j.neuroscience.2013.06.049. Epub 2013 Jul 2.
- Progranulin (PGRN) is known to play a role in the pathogenesis of neurodegenerative diseases. Recently, it has been demonstrated that patients with the homozygous mutation in the GRN gene present with neuronal ceroid lipofuscinosis, and there is growing evidence that PGRN is related to lysosomal fun
- PMID 23830905
- Pulmonary alveolar microlithiasis: imaging characteristics of planar and SPECT/CT bone scan versus 18F-FDG and 18F-sodium fluoride PET/CT scanning.
- Sahoo MK, Karunanithi S, Bal CS.SourceDepartment of Nuclear Medicine, All India Institute of Medical Sciences (AIIMS), Ansari Nagar, New Delhi, 110029, India, drmksahoo@gmail.com.
- Japanese journal of radiology.Jpn J Radiol.2013 Oct 2. [Epub ahead of print]
- Pulmonary alveolar microlithiasis (PAM) is a very rare disease in which multiple microscopic calcium phosphate microliths are deposited within the alveoli of both lungs. A lung biopsy is considered to be definitive for final diagnosis; however, non-invasive imaging modalities such as chest X-ray, HR
- PMID 24085587
- Effect of open-sandwich vs. adhesive restorative techniques on enamel and dentine demineralization: An in situ study.
- Kirsten GA, Rached RN, Mazur RF, Vieira S, Souza EM.SourceGraduate Program in Dentistry, School of Health and Biosciences, Pontifícia Universidade Católica do Paraná, Curitiba, PR, Brazil.
- Journal of dentistry.J Dent.2013 Oct;41(10):872-80. doi: 10.1016/j.jdent.2013.07.003. Epub 2013 Jul 11.
- OBJECTIVES: To assess in situ the effect of different restorative techniques used with fluoride-releasing materials on enamel and dentine demineralization in the presence of a cariogenic challenge.METHODS: Thirty human molars were prepared for 60 Class V cavities, with enamel and dentine margins. Th
- PMID 23851134
Related Links
- Calcium fluoride is the inorganic compound with the formula CaF2. This ionic compound of calcium and fluorine occurs naturally as the mineral fluorite (also called fluorspar). It is the source of most of the world's fluorine. This insoluble solid ...
- 22 Apr 2008 ... Calcium Fluoride is a cell salt that is used by the body to help retain proper elasticity of the tissues. Any condition that arises from a loss of connective tissue integrity and strength, such as weaknesses of bone, enamel, ...
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