Data Item _refine.ls_hydrogen_treatment
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General 
- Item name
- _refine.ls_hydrogen_treatment
- Category name
- refine
- Attribute name
- ls_hydrogen_treatment
- Required in PDB entries
- no
- Used in current PDB entries
- Yes, in about 0.001 % of entries
Item Description
Treatment of hydrogen atoms in the least-squares refinement.
Data Type 
- Data type code
- ucode
- Data type detail
- code item types/single words (case insensitive) ...
- Primitive data type code
- uchar
- Regular expression
- [_,.;:"&<>()/\{}'`~!@#$%A-Za-z0-9*|+-]*
Controlled Vocabulary
| Allowed Value | Details |
|---|---|
| constr | H-atom parameters constrained |
| mixed | some constrained, some independent |
| noref | no refinement of H-atom parameters |
| refU | refined H-atom U's only |
| refall | refined all H-atom parameters |
| refxyz | refined H-atom coordinates only |
| undef | H-atom parameters not defined |
Controlled Vocabulary at Deposition
| Allowed Value | Details |
|---|---|
| constr | H-atom parameters constrained |
| mixed | some constrained, some independent |
| noref | no refinement of H-atom parameters |
| refU | refined H-atom U's only |
| refall | refined all H-atom parameters |
| refxyz | refined H-atom coordinates only |
| undef | H-atom parameters not defined |
Aliases
| Alias Item Name | Dictionary Name | Dictionary Version |
|---|---|---|
| _refine_ls_hydrogen_treatment | cif_core.dic | 2.0.1 |