PIGMENTS


MINERALS

Dana Classification


SPAFMSR

PNII - IDEI COD 2119/2008



Alexandru Ioan Cuza UniversityFaculty of Geography and Geology

Orpiment

Formula: As2S3
Crystal Data: Crystal System: Monoclinic - Prismatic
Point Group: 2/m
Cell Data: Space Group: P 21/n, a = 11.49, b = 9.59, c = 4.25, Z = 4
Using the mouse (click here for more information) Density (calc.) = 3.49 and V = 468.29 Å3
Element color: As, S
Orpiment

Sample no. 5170 from the "Mineralogy and Petrography Museum Grigore Cobălcescu" of "Alexandru Ioan Cuza" University, Iaşi.

Origin: Moldova Noua.




Click image to enlarge
Element color: As, S Toggle Grid Toggle Coordinates Reverse Spectrum

Click to in the Raman spectrum. To see the vibrations click on one of them (highlight region) and it (the selected vibration) will appear on the right side of the Raman spectrum.
Below spectra are various settings, and other vibrations of orpiment (which are not present in this spectrum).
You have the possibility to zoom in the spectrum by selecting a spectral region you need to be increased (along axis x); to zoom keep the left mouse-click continously pressed, drag (to left or to right) and release the left button. To return to the initial size spectrum, press the right click on the spectrum -> Zoom -> Reset View.
Model type:
Sticks Ball-and-Sticks (1) Ball-and-Sticks (2) CPK (Spacefill)

Orientation:
Reset view Front view Back view Left view Right view Top view Bottom view 		Background color:
Reset White(1) Black

Spin on Spin off
Symbols on Symbols off
 Vibrations:
ν ν ν ν

Vibration on Vibration off 		Download spectrum:
Raman spectrum .txt Raman spectrum .spc


Vectors on Vectors off
Measure distances Delete measure
Axes on Axes off

• The Mineralogy Database [link]

• Crystal data (.cif file) from the American Mineralogist Crystal Structure Database [link]

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