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

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Presentation on theme: "ICDD Workshop 1 and 3 Sample Preparation Group C Photographs by Stephen Williams."— Presentation transcript:

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…

9

10 ICDD School Group C PanAlytical Specimens

11 VisibleRef. CodeScoreCompound NameChemical Formula * Calcite, synCa C O3 * Bassanite, synCa S O4 ·0.5 H2 O * Anhydrite, synCa S O4 * DolomiteCa 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 * Gypsum, synCa S O4 ·2 H2 O Gypsum prep’ed as backfilled shows some preferred orientation but not too bad

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

14 VisibleRef. CodeScoreCompound NameChemical Formula * Gypsum, 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 * Gypsum, 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 * HaliteNa Cl Shift of sample To high 2theta Preferred orientation (200)

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

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


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