HOLMIUM FLUORIDE Property

Melting point:

1143°C

Boiling point:

>2200°C

Density 

7,64 g/cm³

refractive index 

1.53

solubility 

soluble in H2O

form 

powder

color 

pink-yellow orthorhombic crystals, crystalline; hygroscopic

Water Solubility 

Insoluble in water.

Sensitive 

Hygroscopic

Crystal Structure

YF3 type

crystal system

Nogata

Space group

Pnma

Lattice constant

a/nm	b/nm	c/nm	α/o	β/o	γ/o	V/nm3
0.641	0.687	0.438	90	90	90	0.193

Exposure limits

ACGIH: TWA 2.5 mg/m3
NIOSH: IDLH 250 mg/m3

CAS DataBase Reference

13760-78-6(CAS DataBase Reference)

EPA Substance Registry System

Holmium fluoride (HoF3) (13760-78-6)

Safety

Hazard Codes 

T

Risk Statements 

23/24/25-32

Safety Statements 

26-36/37/39-45

RIDADR 

UN 3288 6.1/PG 3

WGK Germany 

3

Hazard Note 

Hygroscopic

TSCA 

Yes

HazardClass 

6.1

PackingGroup 

III

HS Code 

2826199090

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H302Harmful if swallowed

H312Harmful in contact with skin

H315Causes skin irritation

H319Causes serious eye irritation

H331Toxic if inhaled

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P403+P233Store in a well-ventilated place. Keep container tightly closed.

P405Store locked up.

HOLMIUM FLUORIDE Chemical Properties,Usage,Production

Chemical Properties

Bright-yellow solid. Insoluble in water.

Uses

Holmium(III) fluoride is used as an intermediate in the manufacture of glass, metal halide lamp and dopant to garnet laser. It is employed in metallurgy, chemical and physical vapor deposition and in some optical coatings.

Uses

Dysprosium is most commonly used as in Neodymium-iron-boron high strength permanent magnets. While it has one of the highest magnetic moments of any of the rare earths (10.6uB), this has not resulted in an ability to perform on its own as a practical alternative to Neodymium compositions.
It is however now an essential additive in NdFeB production. It is also used in special ceramic compositions based on BaTiO formulations.
Dysprosium is used, in conjunction with Vanadium and other elements, in making laser materials and commercial lighting. Nanofibers of Dysprosium compounds have high strength and large surface area. Therefore, they can be used to reinforce other materials and as a catalyst.
Recent research has examined the use of Dysprosium in Dysprosium-iron-garnet (DyFeG) and silicon implanted with Dysprosium and Holmium to form donor centers.
Dysprosium Metal is an important additive for NdFeB permanent magnets to raise the Curie temperature and improve temperature coefficiency. Another most promising use of high purity Dysprosium Metal is in the magnetostrictive alloy TEFENOL-D. There are also other applications for some special master alloys. It is highly susceptible to magnetization, they are employed in various data-storage applications, such as in hard disks.