|       | Layer thickness (+-3mm) after immersion in SBF | Layer thickness (+-3mm) after immersion in SBF | Layer thickness (+-3mm) after immersion in SBF | Layer thickness (+-3mm) after immersion in SBF |
|       | 24h                                            | 72h                                            | 168h                                           | 336h                                           |
| B0    | 6                                              | 9                                              | 12                                             | 18                                             |
| B1.25 | 0                                              | 0                                              | 0                                              | 21                                             |
| B2.5  | 0                                              | 0                                              | 0                                              | 3                                              |
| B3.75 | 0                                              | 0                                              | 0                                              | 4                                              |
| B5    | 0                                              | 0                                              | 0                                              | 3                                              |

Caption: Thickness of the layer forming at the surface of the investigated glasses at different immersion times.

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": "6", "type": "Other"}
{"value": "9", "type": "Other"}
{"value": "12", "type": "Other"}
{"value": "18", "type": "Other"}
{"value": "0", "type": "Other"}
{"value": "0", "type": "Other"}
{"value": "0", "type": "Other"}
{"value": "21", "type": "Other"}
{"value": "0", "type": "Other"}
{"value": "0", "type": "Other"}
{"value": "0", "type": "Other"}
{"value": "3", "type": "Other"}
{"value": "0", "type": "Other"}
{"value": "0", "type": "Other"}
{"value": "0", "type": "Other"}
{"value": "4", "type": "Other"}
{"value": "0", "type": "Other"}
{"value": "0", "type": "Other"}
{"value": "0", "type": "Other"}
{"value": "3", "type": "Other"}