### calc_shear_velocities()

Source: http://burnman.readthedocs.io

Calculates shear velocities. This function is part of the 'Reproducing Cottaar, Heister, Rose and Unterborn (2014)' examples.

```APIDOC
## calc_shear_velocities()

### Description
Calculates shear velocities. This function is documented within the context of reproducing a specific scientific paper.

### Method
Function call

### Endpoint
N/A (part of example code)

### Parameters
None explicitly documented in the provided text.

### Request Example
```
calc_shear_velocities()
```

### Response
None explicitly documented in the provided text.
```

--------------------------------

### error()

Source: http://burnman.readthedocs.io

Represents an error calculation. This function is part of the 'Reproducing Cottaar, Heister, Rose and Unterborn (2014)' examples.

```APIDOC
## error()

### Description
Represents an error calculation. This function is documented within the context of reproducing a specific scientific paper.

### Method
Function call

### Endpoint
N/A (part of example code)

### Parameters
None explicitly documented in the provided text.

### Request Example
```
error()
```

### Response
None explicitly documented in the provided text.
```

--------------------------------

### PerplexMaterial Class

Source: http://burnman.readthedocs.io

Documentation for the PerplexMaterial class, which represents materials in the system. It includes various properties and methods for accessing thermodynamic data and manipulating material states.

```APIDOC
## PerplexMaterial

### Description
Represents a material within the Perple_X system, providing access to its thermodynamic properties and methods for state manipulation.

### Methods
- `PerplexMaterial.name` (property): The name of the material.
- `PerplexMaterial.set_state(T, P)`: Sets the thermodynamic state of the material.
- `PerplexMaterial.molar_volume`: Molar volume of the material.
- `PerplexMaterial.molar_enthalpy`: Molar enthalpy of the material.
- `PerplexMaterial.molar_entropy`: Molar entropy of the material.
- `PerplexMaterial.isothermal_bulk_modulus_reuss`: Isothermal bulk modulus (Reuss average).
- `PerplexMaterial.isentropic_bulk_modulus_reuss`: Isentropic bulk modulus (Reuss average).
- `PerplexMaterial.molar_heat_capacity_p`: Molar heat capacity at constant pressure.
- `PerplexMaterial.thermal_expansivity`: Thermal expansivity.
- `PerplexMaterial.shear_modulus`: Shear modulus.
- `PerplexMaterial.p_wave_velocity`: P-wave velocity.
- `PerplexMaterial.bulk_sound_velocity`: Bulk sound velocity.
- `PerplexMaterial.shear_wave_velocity`: Shear wave velocity.
- `PerplexMaterial.molar_gibbs`: Molar Gibbs free energy.
- `PerplexMaterial.molar_mass`: Molar mass.
- `PerplexMaterial.density`: Density.
- `PerplexMaterial.molar_internal_energy`: Molar internal energy.
- `PerplexMaterial.molar_helmholtz`: Molar Helmholtz free energy.
- `PerplexMaterial.isothermal_compressibility_reuss`: Isothermal compressibility (Reuss average).
- `PerplexMaterial.isentropic_compressibility_reuss`: Isentropic compressibility (Reuss average).
- `PerplexMaterial.molar_heat_capacity_v`: Molar heat capacity at constant volume.
- `PerplexMaterial.grueneisen_parameter`: Grüneisen parameter.
- `PerplexMaterial.C_p`: Heat capacity at constant pressure.
- `PerplexMaterial.C_v`: Heat capacity at constant volume.
- `PerplexMaterial.G`: Gibbs free energy.
- `PerplexMaterial.G_eff`: Effective Gibbs free energy.
- `PerplexMaterial.H`: Enthalpy.
- `PerplexMaterial.K_S`: Isentropic bulk modulus.
- `PerplexMaterial.K_T`: Isothermal bulk modulus.
- `PerplexMaterial.K_eff`: Effective isentropic bulk modulus.
- `PerplexMaterial.P`: Pressure.
- `PerplexMaterial.S`: Entropy.
- `PerplexMaterial.T`: Temperature.
- `PerplexMaterial.V`: Volume.
- `PerplexMaterial.alpha`: Thermal expansivity.
- `PerplexMaterial.beta_S`: Isentropic compressibility.
- `PerplexMaterial.beta_T`: Isothermal compressibility.
- `PerplexMaterial.copy()`: Creates a copy of the PerplexMaterial object.
- `PerplexMaterial.debug_print()`: Prints debug information about the material.
- `PerplexMaterial.effective_isentropic_bulk_modulus`: Effective isentropic bulk modulus.
- `PerplexMaterial.effective_shear_modulus`: Effective shear modulus.
- `PerplexMaterial.enthalpy()`: Calculates enthalpy.
- `PerplexMaterial.entropy()`: Calculates entropy.
- `PerplexMaterial.evaluate()`: Evaluates the material properties.
- `PerplexMaterial.evaluate_with_volumes()`: Evaluates properties with specified volumes.
- `PerplexMaterial.gibbs()`: Calculates Gibbs free energy.
- `PerplexMaterial.gr()`: Calculates Grüneisen parameter.
- `PerplexMaterial.heat_capacity_p()`: Calculates heat capacity at constant pressure.
- `PerplexMaterial.heat_capacity_v()`: Calculates heat capacity at constant volume.
- `PerplexMaterial.helmholtz()`: Calculates Helmholtz free energy.
- `PerplexMaterial.internal_energy()`: Calculates internal energy.
- `PerplexMaterial.isentropic_thermal_gradient()`: Calculates isentropic thermal gradient.
- `PerplexMaterial.mass()`: Calculates mass.
- `PerplexMaterial.number_of_moles()`: Returns the number of moles.
- `PerplexMaterial.pressure()`: Returns the pressure.
- `PerplexMaterial.print_minerals_of_current_state()`: Prints the minerals of the current state.
- `PerplexMaterial.reset()`: Resets the material state.
- `PerplexMaterial.rho()`: Calculates density.
- `PerplexMaterial.set_method()`: Sets the calculation method.
- `PerplexMaterial.set_state_with_volume()`: Sets the state using volume.
- `PerplexMaterial.temperature()`: Returns the temperature.
- `PerplexMaterial.to_string()`: Returns a string representation of the material.
- `PerplexMaterial.unroll()`: Unrolls the material data.
- `PerplexMaterial.v_p()`: Calculates P-wave velocity.
- `PerplexMaterial.v_phi()`: Calculates phi wave velocity.
- `PerplexMaterial.v_s()`: Calculates S-wave velocity.
- `PerplexMaterial.volume()`: Calculates volume.
```

--------------------------------

### Mineral Class

Source: http://burnman.readthedocs.io

Documentation for the Mineral class, representing individual minerals. It provides methods for setting states, accessing thermodynamic properties, and retrieving basic information.

```APIDOC
## Mineral

### Description
Represents a mineral, providing access to its properties and methods for state manipulation and thermodynamic calculations.

### Methods
- `Mineral.name` (property): The name of the mineral.
- `Mineral.set_method()`: Sets the calculation method for the mineral.
- `Mineral.to_string()`: Returns a string representation of the mineral.
- `Mineral.debug_print()`: Prints debug information about the mineral.
- `Mineral.unroll()`: Unrolls the mineral data.
- `Mineral.set_state(T, P)`: Sets the thermodynamic state of the mineral.
- `Mineral.set_state_with_volume(V)`: Sets the state of the mineral using a specified volume.
- `Mineral.molar_gibbs`: Molar Gibbs free energy.
- `Mineral.molar_volume`: Molar volume.
- `Mineral.molar_entropy`: Molar entropy.
- `Mineral.isothermal_bulk_modulus_reuss`: Isothermal bulk modulus (Reuss average).
- `Mineral.molar_heat_capacity_p`: Molar heat capacity at constant pressure.
- `Mineral.thermal_expansivity`: Thermal expansivity.
- `Mineral.shear_modulus`: Shear modulus.
- `Mineral.formula`: Chemical formula of the mineral.
- `Mineral.molar_mass`: Molar mass.
- `Mineral.density`: Density.
```

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