Gypsum: Difference between revisions
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{{Infobox_Salt | {{Infobox_Salt | ||
|Footnote = | |Footnote = <ref>http://webmineral.com/data/Gypsum.shtml seen on 30.07.2010</ref><ref>http://www.mindat.org/min-1784.html seen on 30.07.2010</ref> | ||
|photo = | |photo = SA101 1.jpeg|300px | ||
|mineralogical_Name = | |mineralogical_Name = Gipsum, Selenite | ||
|chemical_Name = | |chemical_Name = Calcium sulphate dihydrate | ||
|Trivial_Name = | |Trivial_Name = Gypsite, Sulphate of Lime | ||
|chemical_Formula | |chemical_Formula = Ca[SO<sub>4</sub>]•2H<sub>2</sub>O | ||
|Hydratforms = | |Hydratforms = Anhydrite (CaSO<sub>4</sub>)<br>Hemihydrate (CaSO<sub>4</sub>•0,5H<sub>2</sub>O) | ||
|Crystal_Class = | |Crystal_Class = monoclinic | ||
|Crystal_Structure = | |Crystal_Structure = | ||
|Deliqueszenzhumidity = | |Deliqueszenzhumidity = | ||
|Solubility = | |Solubility = | ||
|Density = | |Density = 2,2-2,4 g/cm³ | ||
|MolVolume = | |MolVolume = 74,69 cm<sup>3</sup>/mol | ||
|Molweight = | |Molweight = 172,17g /mol | ||
|Transparency = | |Transparency = | ||
|Cleavage = | |Cleavage = | ||
|Crystal_Habit = | |Crystal_Habit = | ||
|Twinning = | |Twinning = | ||
|Refractive_Indices = | |Refractive_Indices = α = 1,519-1,521<br>β = 1,522-1,523<br>γ = 1,529-1,530 | ||
|Birefringence = | |Birefringence = Δ = 0,010 | ||
|optical_Orientation = | |optical_Orientation = biaxial positive | ||
|Pleochroism = | |Pleochroism = | ||
|Dispersion = | |Dispersion = 58° | ||
|Phase_Transition = | |Phase_Transition = | ||
|chemBehavior = | |chemBehavior = | ||
| Line 30: | Line 30: | ||
back to [[Sulphate]] | back to [[Sulphate]] | ||
==Weblinks== | == Salt and salt-induced damages == | ||
<references/> | |||
=== on objects === | |||
<gallery caption="" widths="200px" heights="150px" perrow="3"> | |||
Image:Perleberg 14.04.2003 (50)-Ausschnitt.jpg|brick damged by gipsum, St. Jakobi Perleberg | |||
Image:| | |||
Image:| | |||
</gallery> | |||
<br clear=all> | |||
=== under the polarising microscope === | |||
<gallery caption="thin-section samples" widths="200px" heights="150px" perrow="3"> | |||
Image:Per_270603_5-13_14.jpg|brick damged by gipsum, St. Jakobi Perleberg | |||
Image:Per_270603_5-13_15.jpg|brick damged by gipsum, St. Jakobi Perleberg | |||
Image:Eilsum_Gips_duennschliff.jpg | |||
</gallery> | |||
<gallery caption="aqueous solution crystallised on a glass slide" widths="200px" heights="150px" perrow="3"> | |||
Image:CaSO4 pol 400x 01.JPG|Gipsum, crystallised from an aqueous solution on a glass slide | |||
Image:CaSO4+NaCl reale Probe 01.JPG|Gipsum with Natriumchloride in a real sample, crystallised from an aqueous solution on a glass slide | |||
Image:CaSO4+NaCl reale Probe 02.JPG|Gipsum with Natriumchloride in a real sample, crystallised from an aqueous solution on a glass slide | |||
Image:HJS CaSO4 092503-1.jpg|Gipsum, crystallised from an aqueous solution on a glass slide | |||
</gallery> | |||
<br clear=all> | |||
== Under the polarising microscope == | |||
<gallery caption="SEM" widths="200px" heights="150px" perrow="3"> | |||
Image:SA100_1.jpg | Gipsum crystals in the SEM | |||
Image:SG2-2.jpeg | Gipsum crystals in the SEM | |||
Image:SG2-3.jpg | Gipsum crystals in the SEM | |||
Image:SG3-SPC2.jpeg | Gipsum crystals in the SEM | |||
Image:SG3-3.jpeg | Gipsum crystals in the SEM | |||
Image:SG3-4.jpeg | Gipsum crystals in the SEM | |||
Image:SG1-5.jpeg | Gipsum crystals in the SEM | |||
Image:SG1-SPC.jpeg | EDX spectrum of gypsum in the SEM | |||
</gallery> | |||
<br clear=all> | |||
== Weblinks == | |||
<references /> | |||
[[Category:Gipsum]][[Category:Sulphate]][[Category:Salt]][[Category:InProgress]] | [[Category:Gipsum]][[Category:Sulphate]][[Category:Salt]][[Category:InProgress]] | ||
Revision as of 14:45, 3 June 2011
| Gypsum[1][2] | |
| SA101 1.jpeg | |
| Mineralogical name | Gipsum, Selenite |
| Chemical name | Calcium sulphate dihydrate |
| Trivial name | Gypsite, Sulphate of Lime |
| Chemical formula | Ca[SO4]•2H2O |
| Other forms | Anhydrite (CaSO4) Hemihydrate (CaSO4•0,5H2O) |
| Crystal system | {{{Crystal_System}}} |
| Crystal structure | |
| Deliquescence humidity 20°C | |
| Solubility (g/l) at 20°C | |
| Density (g/cm³) | 2,2-2,4 g/cm³ |
| Molar volume | 74,69 cm3/mol |
| Molar weight | 172,17g /mol |
| Transparency | |
| Cleavage | |
| Crystal habit | |
| Twinning | |
| Phase transition | |
| Chemical behavior | |
| Comments | |
| Crystal Optics | |
| Refractive Indices | α = 1,519-1,521 β = 1,522-1,523 γ = 1,529-1,530 |
| Birefringence | Δ = 0,010 |
| Optical Orientation | biaxial positive |
| Pleochroism | |
| Dispersion | 58° |
| Used Literature | |
| {{{Literature}}} | |
back to Sulphate
Salt and salt-induced damages[edit]
on objects[edit]
brick damged by gipsum, St. Jakobi Perleberg
-Ausschnitt.jpg)
under the polarising microscope[edit]
- thin-section samples
brick damged by gipsum, St. Jakobi Perleberg
brick damged by gipsum, St. Jakobi Perleberg
- aqueous solution crystallised on a glass slide
Gipsum, crystallised from an aqueous solution on a glass slide
Gipsum with Natriumchloride in a real sample, crystallised from an aqueous solution on a glass slide
Gipsum with Natriumchloride in a real sample, crystallised from an aqueous solution on a glass slide
Gipsum, crystallised from an aqueous solution on a glass slide
Under the polarising microscope[edit]
- SEM
Gipsum crystals in the SEM
Gipsum crystals in the SEM
Gipsum crystals in the SEM
Gipsum crystals in the SEM
Gipsum crystals in the SEM
Gipsum crystals in the SEM
Gipsum crystals in the SEM
EDX spectrum of gypsum in the SEM
Weblinks[edit]
- ↑ http://webmineral.com/data/Gypsum.shtml seen on 30.07.2010
- ↑ http://www.mindat.org/min-1784.html seen on 30.07.2010