1. ICDD Workshop 1 and 3 Sample Preparation Group C Photographs by Stephen Williams

2. Side drifted – peaks are a little too high in 2theta angle. Extra peaks may indicate contamination of 2 nd phase or Rx with organic liquid. Pref. Orient.

3. Peak Shift 0.05 degrees Sample holder Container says Plaster of Paris (CaSO 4 ). It looks this stuff has grabbed H 2 O and CO 2 from the air over time Sample was so high that it was not in the focusing plane.

4. Sample A was Epsom Salts. Pack mount but signal still small because of reduced quantity.

5. Textured Aluminum (200) preferred Dolomite present in one sample and not in other.

6. Shifted to high 2theta and preferred orientation on (200) plane (200) Much like my Gold specimen!

7. Raised bkgd from Vaseline and/or glass slide Preferred orientation?

8. Peak positions look good, intensities close but not exact. Is there preferred orientation? Good but boring…

10. ICDD School Group C PanAlytical Specimens

11. VisibleRef. CodeScoreCompound NameChemical Formula *00-005-058656Calcite, synCa C O3 *00-033-031054Bassanite, synCa S O4 ·0.5 H2 O *00-037-149622Anhydrite, synCa S O4 *00-036-042617DolomiteCa Mg ( C O3 )2 Plaster-of-Paris (Anhydrite) is multiphase mix after years on the shelf. Backfilled specimen looks good.

12. VisibleRef. CodeScoreCompound NameChemical Formula *00-033-031145Gypsum, synCa S O4 ·2 H2 O Gypsum prep’ed as backfilled shows some preferred orientation but not too bad

13. VisibleRef. CodeScoreCompound NameChemical Formula *00-024-071962Hexahydrite, synMg S O4 ·6 H2 O *00-025-053241Pentahydrite, synMg S O4 ·5 H2 O Mixture of coordinated H 2 O molecules

14. VisibleRef. CodeScoreCompound NameChemical Formula *00-033-031132Gypsum, synCa S O4 ·2 H2 O C0217G4a Very strong preferred orientation. -I guess Side drift method -did not work out so well.

15. VisibleRef. CodeScoreCompound NameChemical Formula *00-033-031145Gypsum, synCa S O4 ·2 H2 O Back filled is not too bad for randomness but still has exaggerated low angle peak

16. VisibleRef. CodeScoreCompound NameChemical Formula *00-001-099332HaliteNa Cl Shift of sample To high 2theta Preferred orientation (200)

17. VisibleRef. CodeScoreCompound NameChemical Formula *00-005-062887Halite, synNa Cl Straight-forward ID of Halite

18. VisibleRef. CodeScoreCompound NameChemical Formula *00-033-031131Gypsum, synCa S O4 ·2 H2 O *00-021-127228Anatase, synTi O2 Don’t eat it Contamination from sample G?