| Glass matrix       | Silicate                             | Borate, phosphate                   |
| Temperature (degC) | 1500                                 | 1200                                |
| Time (h)           | 2                                    | 1                                   |
| Atmosphere         | Ar (    P     O   2     = 10  Pa  ), | Ar (    P     O   2     = 10  Pa  ) |

Caption: Melting conditions

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": "1500", "type": "Other"}
{"value": "1200", "type": "Other"}
{"value": "2", "type": "Other"}
{"value": "1", "type": "Other"}