# Using more than one lookup table in Steinberger material model

**URL:** https://community.geodynamics.org/t/using-more-than-one-lookup-table-in-steinberger-material-model/3290
**Category:** ASPECT
**Tags:** material-model
**Created:** [February 26, 2024, 8:02pm UTC](https://community.geodynamics.org/t/using-more-than-one-lookup-table-in-steinberger-material-model/3290 "2024-02-26T20:02:02Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![rhino1999](https://yyz2.discourse-cdn.com/flex036/user_avatar/community.geodynamics.org/rhino1999/32/1351_2.png) [@rhino1999](https://community.geodynamics.org/u/rhino1999)
#### Post date: [February 26, 2024, 8:02pm UTC](https://community.geodynamics.org/t/using-more-than-one-lookup-table-in-steinberger-material-model/3290/1 "2024-02-26T20:02:02Z")

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Hello all,

I am trying to prescribe two chemical fields in my model and each field read in its density and other thermal properties from a lookup table. I read from the manual that it is possible to read in more than one lookup table in the Steinberger material model, but I am not sure how should I set up the “Compositional fields” subsection. Is any example prm file that I can find to guide me setting up my own input file?

Thanks,  
Lucy

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### Author: ![bobmyhill](https://yyz2.discourse-cdn.com/flex036/user_avatar/community.geodynamics.org/bobmyhill/32/38_2.png) [@bobmyhill](https://community.geodynamics.org/u/bobmyhill)
#### Post date: [February 27, 2024, 10:48am UTC](https://community.geodynamics.org/t/using-more-than-one-lookup-table-in-steinberger-material-model/3290/2 "2024-02-27T10:48:58Z")

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Hi Lucy,

Have a look here: [`tests/steinberger_phases_2_lookups.prm`](https://github.com/geodynamics/aspect/blob/main/tests/steinberger_phases_2_lookups.prm)

Best wishes,  
Bob