| Structural group | Theoretically calculated    | Theoretically calculated         | Theoretically calculated | Experimental frequency (cm-1) | Experimental frequency (cm-1) |
|                  |                             |                                  |                          |                               |                               |
|                  | Reduced mass (x10-26 kgU-1) | Stretching force constant (Nm-1) | Frequency (cm-1)         | This work                     | Literature data               |
| Si-O-Si          | 1.242                       | 776                              | 1327                     | 1122                          | 1122                          |
| Si-O-Pb          | 1.613                       | 667                              | 1079                     | 990                           | 992                           |

Caption: Theoretically calculated reduced mass, force constant and frequency of Si-O-Si and Si-O-Pb structural groups

You are provided with a table from a material science paper. Here are JSON templates for two types of numeric cells: "Other" and "Glass_Compound_Amount":
{"value": "xx", "type": "Other"}
{"value": "xx", "type": "Glass_Compound_Amount", "constituent": "xx", "unit": "xx", "material": "xx"}

Please describe all numeric cells in the above table following the JSON templates (proceeding by row in a left-right, top-down direction). For each cell, output one JSON description per line. For any unanswerable attributes in the templates, set their value to the placeholder "xx".

Cell Description:
{"value": "1.242", "type": "Other"}
{"value": "776", "type": "Other"}
{"value": "1327", "type": "Other"}
{"value": "1122", "type": "Other"}
{"value": "1122", "type": "Other"}
{"value": "1.613", "type": "Other"}
{"value": "667", "type": "Other"}
{"value": "1079", "type": "Other"}
{"value": "990", "type": "Other"}
{"value": "992", "type": "Other"}