Controlled benchmark: Si assembly

Summary

Experiment UID	40343127-faee-47b3-bec7-1e81e2f5f966
Crystals	71
Active	71
Removed	0
Crystal structure	Fd-3m:1 (5.431 Å, 5.431 Å, 5.431 Å, 90.0°, 90.0°, 90.0°)
Pads	3

Sample metadata

Persistent sample identifier

IGSN 10.83211/alsa-4034

https://doi.org/10.83211/alsa-4034

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DataCite state

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Identification

Sample name

Coaligned crystal assembly of Si

Sample type

Coaligned Crystal Assembly

Chemical formula

Si

Creator

David Sviták

ORCID

0009-0005-3635-9140

Created

3 September 2026

Subjects

• Si
• Coaligned Crystal Assembly

Experiment UID

40343127-faee-47b3-bec7-1e81e2f5f966

Institution

Charles University · ROR

Material & crystal structure

Chemical formula

Si

Space group

Fd-3m:1

a5.431 Å

b5.431 Å

c5.431 Å

α90.0°

β90.0°

γ90.0°

Physical assembly

Sample type

Coaligned Crystal Assembly

Active crystals

71

Removed crystals

0

Pads

3

Holder material

Aluminum EN AW 1050

Crystal mass

Not recorded

The IGSN identifies the complete physical assembly. Individual crystal records below are domain metadata, not separate PID-identified samples.

Provenance

Produced by

ALSA crystal coalignment

Creator

David Sviták · ORCID

Creation date

3 September 2026

Experiment UID

40343127-faee-47b3-bec7-1e81e2f5f966

Laboratory / publisher

Materials Growth and Measurement Laboratory (MGML), Charles University

Publication year

2026

Metadata rights

CC0 1.0 Universal — metadata may be reused without restriction

Metadata

Machine-readable metadata

DataCite Metadata Schema 4.7 record (XML) and the equivalent DataCite REST API payload (JSON).

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Analysis Configuration

Setting	Value
Rotation average	l1
Weighting	auto
Twist axis	original
Histogram bin width	0.100°

Pads

The orientation spread on each pad is reported as a swing-twist decomposition relative to the weighted representative median orientation that minimizes total geodesic distance. The decomposition uses the orthogonalized z-axis, chosen because it is perpendicular to the pad in the selected orthogonalization scheme.

• Swing: The angular tilt of each crystal’s axis away from the representative orientation.
• Twist: The remaining in-plane rotation around the representative axis after swing is removed.

Swing is reported as signed x and y components in the tangent plane. The medians show systematic tilt bias; the standard deviations show directional spread. Equal weighting gives every crystal weight 1. Automatic weighting uses complete positive crystal masses when available, otherwise complete assigned-pad contour areas, otherwise equal weights. The selected source is shown below and recorded in the deviation CSV.

Note

Excessive swing angles are mostly attributed to crystal non-flatness.

Pad orientation summary

Pad ID	Crystals	Weight source	Twist median	Twist std dev	Swing x median	Swing x std dev	Swing y median	Swing y std dev
12	17	area	-0.013°	0.241°	0.098°	0.274°	0.168°	0.242°
17	25	area	-0.014°	1.217°	0.135°	0.466°	0.039°	0.575°
21	22	area	-0.006°	0.230°	0.025°	0.242°	0.046°	0.238°

Pad 12

Planar map of pad 12

Pad 12 twist histogram

Pad 12 swing sphere

Interactive swing sphere

Interactive pad visualization

Pad 17

Planar map of pad 17

Pad 17 twist histogram

Pad 17 swing sphere

Interactive swing sphere

Interactive pad visualization

Pad 21

Planar map of pad 21

Pad 21 twist histogram

Pad 21 swing sphere

Interactive swing sphere

Interactive pad visualization

Crystals

Crystal record

1

Assignment

12

Macro image (cropped)

Target orientation lauegram

Removed and Unused Crystals

No crystals are removed or unused.

How to cite this sample

Sviták, David (2026). Coaligned crystal assembly of Si. Materials Growth and Measurement Laboratory (MGML), Charles University. IGSN: https://doi.org/10.83211/alsa-4034.

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