2. HOLMIUM By Micah 2HoF 3 + 3Ca → 2Ho + 3CaF 2 http://www.webelements.com/

3. physical properties

4. crystalline structure  Structure: hexagonal close- packed (hcp)  Space group: P63/mmc  Space group number: 194  Structure: hexagonal close- packed (hcp)  Space group: P63/mmc  Space group number: 194

5. Facts…  Atomic number: 67  Symbol: Ho  Atomic Weight: 164.93032  Number of Protons:67  Number of electrons:67  Number of Neutrons: 98  Atomic number: 67  Symbol: Ho  Atomic Weight: 164.93032  Number of Protons:67  Number of electrons:67  Number of Neutrons: 98

6. More facts…  Block: F  Period: 6  Group: Lanthanoid  Electronic Configuration:[Xe] 4f11 6s2 aka [Xe]6s 2 4f 11  Block: F  Period: 6  Group: Lanthanoid  Electronic Configuration:[Xe] 4f11 6s2 aka [Xe]6s 2 4f 11

7. Uses of Holmium:  Used in filters that help calibrate the wavelength settings in UV spectrophotomet- ers  Used to color red or yellow glass  Used in some jewelry

8. More uses…  Used in some solid state lasers  Used in the calibration of gamma ray spectrometers  Used in microwaves, and also dental/ medical settings  Used in some solid state lasers  Used in the calibration of gamma ray spectrometers  Used in microwaves, and also dental/ medical settings

9. Where do you find holmium?  In the element Monazite  In the element Gadolinite  **Note: Holmium is very rarely found in nature, and when it is, it is in small quantity.

10. Chemical Properties:  Stable at room temperature  Dissolves in acids  Oxidation State: +3  Stable at room temperature  Dissolves in acids  Oxidation State: +3

11. Fun Facts:  The word “holmium” comes from the Latin word Holmia, which means Stockholm.  Stockholm is the hometown of the founder of holmium.  It costs $10 for a single gram of holmium!  http://www.youtube.com/watch?v=3ERc- vPLMUs http://www.youtube.com/watch?v=3ERc- vPLMUs  http://www.youtube.com/watch?v=Klfui3 WSQ00 http://www.youtube.com/watch?v=Klfui3 WSQ00  The word “holmium” comes from the Latin word Holmia, which means Stockholm.  Stockholm is the hometown of the founder of holmium.  It costs $10 for a single gram of holmium!  http://www.youtube.com/watch?v=3ERc- vPLMUs http://www.youtube.com/watch?v=3ERc- vPLMUs  http://www.youtube.com/watch?v=Klfui3 WSQ00 http://www.youtube.com/watch?v=Klfui3 WSQ00