Chromium(III) Iodide (CrI3) Powder and Crystals
CAS Number 13569-75-0
2D Materials, Low Dimensional Materials, Materials, Transition Metal Chalcogenides (TMCs)Please choose the appropriate MSDS from the list below. Links will open in a new window. If your browser does not support PDFs, you will be prompted to download the file instead.
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Chromium(III) iodide, also known as chromium triiodide CrI3 (CAS number 13569-75-0), belongs to a rare group of layered transition metal trichalcogenides (TMTCs) ferromagnetic semiconductors. Unlike chromium trichloride which shows a 2D-Heisenberg magnetic behaviour, CrI3 exhibits stronger magnetic anisotropy promoting a 3D magnetic characteristic with larger van der Waals gap thus smaller cleavage energy.
The magnetic properties of CrI3 are the layer thickness and stacking order dependent. Bulk CrI3 is ferromagnetic (FM) with a Curie temperature of 61 K and a rhombohedral layer stacking, while few-layer CrI3 has a layered antiferromagnetic (AFM) phase with a lower ordering temperature of 45 K and a monoclinic stacking.
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High purity ≥99.995% Powder
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Low Cost
Competitively priced CrI3
Single or few-layer
Can be used to produce single or few-layer sheets
Changing the spin direction of CrI3 via an external field can significantly alter the electronic band structures, including a direct-to-indirect bandgap transition, Fermi surface and topological electronic states modification. Direct-to-indirect bandgap transition can be used to develop magneto-optoelectronic device where the photoconductivity can be switched by an external magnetic field.
We supply low price chromium(III) iodide in several different forms for a range of applications.
Chromium(III) Iodide Powder
Can be used for preparation of chromium(III) iodide nanoplates and ultrathin films
Sold by weight
≥99.995% purity
From £500
Chromium(III) Iodide Crystals by Size
Can be used to produce single or few-layer chromium(III) iodide sheets via mechanical or liquid exfoliation
Small (≥10 mm2) or medium (≥25 mm2) crystals available*
≥99.999% purity
From £520
*Typical representative size, areas/dimensions may vary
Bulk single chromium(III) iodide crystal is most commonly used as sources from which single or few-layer sheets can be obtained via either mechanical or liquid exfoliation.
Chromium(III) iodide powder can also be used to prepare CrI3 nanosheets and nanoparticles by liquid-exfoliation (normally assisted by sonication).
Key Product Data
- High purity, low price CrI3
- Available as a powder or as individual crystals
- Can be used to produce single or few-layer sheets
- Free worldwide shipping on qualifying orders
Technical Data
CAS Number | 13569-75-0 |
Chemical Formula | CrI3 |
Molecular Weight | 432.71 g/mol |
Bandgap | 0.6 - 0.67 eV |
Preparation | Synthetic - Chemical Vapour Transport (CVT) |
Structure | Trigonal |
Electronic Properties | 2D ferromagnetic semiconductor |
Melting Point | >600 °C |
Colour | Dark green |
Synonyms | Chromium Triiodide |
Classification / Family | Transition metal trichalcogenides (TMTCs), 2D semiconductor materials, Nano-electronics, Nano-photonics, Photovoltaic, Materials science |
Product Details
Form | Purity |
Powder | ≥99.995% |
Crystal | ≥99.999% |
Pricing Table
Product Code | Form | Size/Weight* | Price |
M2323C1 | Powder | 500 mg | £500 |
M2323C1 | Powder | 1 g | £800 |
M2323A10 | Crystal | Small (≥10 mm2) | £520 ea. |
M2323A25 | Crystal | Medium (≥25 mm2) | £850 ea. |
*typical representative size, areas/dimensions may vary
Shipping is free for qualifying orders.
MSDS Documents
Structure of Chromium(III) Iodide
Single crystals of chromium(III) iodide is a layered and easily cleavable insulating ferromagnet with Curie temperature of 61 K. The structure at low temperature is rhombohedral (R3, BiI3 -type) and the high temperature structure is monoclinic (C2/m, AlCl3 -type).
The Pristine monolayer CrI3 exhibits a small trigonal distortion of the CrI6 octahedron, with the edge-shared CrI6 octahedra forming a honeycomb lattice of six Cr atoms.
Literature and Reviews
- Layer-dependent Ferromagnetism in a van der Waals Crystal down to the Monolayer Limit, B. Huang et al., Nature 546, 270–273 (2017), DOI: 10.1038/nature22391.
- On the origin of magnetic anisotropy in two dimensional CrI3, J. Lado et al., 2D Mater. 4, 035002 (2017); DOI: 10.1088/2053-1583/aa75ed.
- Critical behavior of two-dimensional intrinsically ferromagnetic semiconductor CrI3, G. Lin et al., Appl. Phys. Lett. 112, 072405 (2018); DOI: 10.1063/1.5019286.