diff --git a/janus_core/calculations/geom_opt.py b/janus_core/calculations/geom_opt.py
index 1b41c338..30e3ffa8 100644
--- a/janus_core/calculations/geom_opt.py
+++ b/janus_core/calculations/geom_opt.py
@@ -17,13 +17,15 @@
 
 from janus_core.helpers.janus_types import ASEOptArgs, ASEWriteArgs
 from janus_core.helpers.log import config_logger
-from janus_core.helpers.utils import none_to_dict
+from janus_core.helpers.utils import none_to_dict, spacegroup
 
 
 def optimize(  # pylint: disable=too-many-arguments,too-many-locals,too-many-branches
     struct: Atoms,
     fmax: float = 0.1,
     steps: int = 1000,
+    symmetry_precision=0.0001,
+    angle_precision=-1,
     filter_func: Optional[Callable] = DefaultFilter,
     filter_kwargs: Optional[dict[str, Any]] = None,
     optimizer: Callable = LBFGS,
@@ -45,6 +47,12 @@ def optimize(  # pylint: disable=too-many-arguments,too-many-locals,too-many-bra
         Default is 0.1.
     steps : int
         Set maximum number of optimization steps to run. Default is 1000.
+    symmetry_precision : float
+        Set symmtery precision crieria for spacegroup determination.
+        Default is 0.0001.
+    angle_precision : float
+        Set angle precision crieria for spacegroup determination.
+        Default is =1.
     filter_func : Optional[callable]
         Apply constraints to atoms through ASE filter function.
         Default is `FrechetCellFilter` if available otherwise `ExpCellFilter`.
@@ -93,6 +101,12 @@ def optimize(  # pylint: disable=too-many-arguments,too-many-locals,too-many-bra
     log_kwargs.setdefault("name", __name__)
     logger = config_logger(**log_kwargs)
 
+    sg = spacegroup(struct, symmetry_precision, angle_precision)
+    message = f"Before optimisation spacegroup {sg}"
+    print(message)
+    if logger:
+        logger.info(message)
+
     if filter_func is not None:
         filtered_struct = filter_func(struct, **filter_kwargs)
         dyn = optimizer(filtered_struct, **opt_kwargs)
@@ -114,6 +128,10 @@ def optimize(  # pylint: disable=too-many-arguments,too-many-locals,too-many-bra
 
     converged = dyn.run(fmax=fmax, steps=steps)
 
+    sg = spacegroup(struct, symmetry_precision, angle_precision)
+    message = f"After optimisation spacegroup {sg}"
+    print(message)
+
     # Calculate current maximum force
     if filter_func is not None:
         max_force = linalg.norm(filtered_struct.get_forces(), axis=1).max()
@@ -121,6 +139,7 @@ def optimize(  # pylint: disable=too-many-arguments,too-many-locals,too-many-bra
         max_force = linalg.norm(struct.get_forces(), axis=1).max()
 
     if logger:
+        logger.info(message)
         logger.info("Max force: %.6f", max_force)
 
     if not converged:
diff --git a/janus_core/helpers/utils.py b/janus_core/helpers/utils.py
index b675926a..c93d9188 100644
--- a/janus_core/helpers/utils.py
+++ b/janus_core/helpers/utils.py
@@ -3,6 +3,42 @@
 from pathlib import Path
 from typing import Optional
 
+from ase import Atoms
+from spglib import get_spacegroup
+
+
+def spacegroup(
+    struct: Atoms, sym_precision: float = 0.001, angle_precision: float = -1.0
+) -> str:
+    """
+    Determine the spacegroup for a structure.
+
+    Parameters
+    ----------
+    struct : Atoms
+        Structure as an ase Atoms object.
+    sym_precision : float
+        Symmetry precision for spglib symmetry determination.
+        Default 0.001.
+    angle_precision : float
+        Angle precision for spglib symmetry determination.
+        Default: -1.
+
+    Returns
+    -------
+    str
+        Spacegroup name.
+    """
+    return get_spacegroup(
+        cell=(
+            struct.get_cell(),
+            struct.get_scaled_positions(),
+            struct.get_atomic_numbers(),
+        ),
+        symprec=sym_precision,
+        angle_tolerance=angle_precision,
+    )
+
 
 def none_to_dict(dictionaries: list[Optional[dict]]) -> list[dict]:
     """