Alternative slip systems for FCC

[kata-neumann]

Hello,
I ran into a problem when calculating the average Schmid factors for grain. The notation and calculations work correctly for the default given slipSystems = None as shown in the following code:

#Grain detection in EBSD
ebsdMap.findBoundaries(boundDef=10)
ebsdMap.findGrains(minGrainSize=10)

#Slip system
phase = ebsdMap.phases[0] 
print(phase.name)
phase.printSlipSystems()

ebsdMap.calcAverageGrainSchmidFactors(loadVector=np.array([1,0,0]), slipSystems=None)

Where I get the output:

(111) Colour: blue Angle: 127.78
  [011̅] SF: 0.315
  [1̅01] SF: 0.052
  [11̅0] SF: 0.367
(111̅) Colour: green Angle: 121.77
  [011] SF: 0.319
  [1̅01̅] SF: 0.071
  [11̅0] SF: 0.390
(1̅11) Colour: red Angle: 39.59
  [011̅] SF: 0.471
  [101] SF: 0.101
  [1̅1̅0] SF: 0.371
(11̅1) Colour: white Angle: 27.47
  [01̅1̅] SF: 0.467
  [1̅01] SF: 0.081
  [110] SF: 0.386

The issue occurs when I want to change the slip direction from [1,1,0], which was the default (as I assume), to slip direction [1,1,2]. See the code below:

#Slip system
phase = ebsdMap.phases[0]
print(phase.name)
phase.printSlipSystems()

my_SlipSystem = [[defdap.crystal.SlipSystem([1,1,1], [1,1,2], ebsdMap.grainList[0].phase.crystalStructure)]]

ebsdMap.calcAverageGrainSchmidFactors(loadVector=np.array([1,0,0]), slipSystems=my_SlipSystem)

I get the output:

(111) Colour: blue Angle: 127.78
  [011̅] SF: 0.134

So the value has changed, but the slip plane and slip direction still keep their format of writing [1,1,1] and [1,1,0].
I would like to ask if there is a bug in my code, or if I need to use another function.

Thank you in advance for your help.