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Physical & Chemical properties

Particle size distribution (Granulometry)

Administrative data

Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
24 October 2016
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study without detailed documentation

Data source

Reference
Reference Type:
other company data
Title:
Unnamed
Year:
2017
Report Date:
2017

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
Within this study, particle size distribution was determined using Sedigraph 5200 equipment. The measurement principle is X-ray monitored gravity sedimentation, which provides results based on Stokes sedimentation and Beer's law of extinction.
GLP compliance:
not specified
Type of method:
sedimentation (gravitational settling)
Type of distribution:
mass based distribution

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder
Details on test material:
- Name of test material (as cited in study report): yttrium trifluoride
- Physical state: solid
- Appearance: white powder
- Further information on test material confidential.

Results and discussion

Particle sizeopen allclose all
Key result
Percentile:
D10
Mean:
0.36 µm
Remarks on result:
other: 1 run
Key result
Percentile:
D50
Mean:
0.62 µm
Remarks on result:
other: 1 run
Key result
Percentile:
D90
Mean:
1.07 µm
Remarks on result:
other: 1 run

Any other information on results incl. tables

Results in terms of size

Low diameter

(µm) 

Cumulative mass finer

(percent)

Low diameter

(µm)

Cumulative mass finer

(percent)

Low diameter

(µm)

Cumulative mass finer

(percent)

 98.00  103.1  50.00  100.7  10.00  100.4
 97.00  103.1  25.00  99.0  5.000  98.7
 75.00  102.2  20.00  98.6  2.000  96.2

Results in terms of mass percent

Low diameter

(µm)

Cumulative mass finer

(percent)

Low diameter

(µm)

Cumulative mass finer

(percent)

Low diameter

(µm)

Cumulative mass finer

(percent)

Low diameter

(µm)

Cumulative mass finer

(percent)

42.88   100.0  2.542  97.0  0.622  50.0  0.357  10.0
 3.433  98.0  1.067  90.0  0.439  20.0  0.307  5.0

Applicant's summary and conclusion

Conclusions:
The d10, d50 and d90 of a representative sample of yttrium trifluoride were determined to be 0.36, 0.62 and 1.07 µm, respectively (mass-based distribution).