FREE shipping to on qualifying orders when you spend or more, processed by Ossila BV. All prices ex. VAT. Qualifying orders ship free worldwide! Fast, secure, and backed by the Ossila guarantee. It looks like you are visiting from , click to shop in or change country. Orders to the EU are processed by our EU subsidiary.

It looks like you are using an unsupported browser. You can still place orders by emailing us on, but you may experience issues browsing our website. Please consider upgrading to a modern browser for better security and an improved browsing experience.

Chromium(III) Iodide (CrI3) Powder and Crystals

CAS Number 13569-75-0

2D Materials, Low Dimensional Materials, Materials, Transition Metal Chalcogenides (TMCs)

Product Code M2323A10
Price £520 ex. VAT

Low price, high purity 2D metal chromium(III) iodide powder and crystal

For the development of next-generation electronics, optoelectronics, and nanotechnology

Technical Data | MSDS | Structure | Literature and Reviews | Resources and Support

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.

high purity 13569-75-0

High purity

High purity ≥99.995% Powder

Worldwide shipping

Worldwide shipping

Quick and reliable shipping

Low Cost Chromium(III) Iodide (CrI3)

Low Cost

Competitively priced CrI3

Single or few-layer Chromium(III) Iodide

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

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 crystal

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

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

Chromium triiodide powder MSDSChromium triiodide powder

Chromium triiodide crystal MSDSChromium triiodide crystal

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).

Chromium(III) iodide crystal structure layers

The Pristine monolayer CrIexhibits a small trigonal distortion of the CrI6 octahedron, with the edge-shared CrI6 octahedra forming a honeycomb lattice of six Cr atoms.

Top and side view of single-layer chromium(III) iodide
Top and side view of single-layer chromium(III) iodide.

Literature and Reviews

  1. 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.
  2. 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.
  3. Critical behavior of two-dimensional intrinsically ferromagnetic semiconductor CrI3, G. Lin et al., Appl. Phys. Lett. 112, 072405 (2018); DOI: 10.1063/1.5019286.

  4. We stock a wide range of 2D materials available to purchase online. Please contact us if you cannot find what you are looking for.

    Resources and Support

    Viscoelastic Transfer of 2D Material Using PDMS

    Viscoelastic transfer using polydimethylsiloxane (PDMS) stamps is one of the methods used for the deterministic placement of 2D materials and the fabrication of van der Waals heterostructures. It relies on the viscoelasticity of PDMS, which behaves as an elastic solid on short time scales, but as a viscous fluid on long time scales.

    Learn more...
Return to the top