| Label  | Average stretching force constant F in (N/m) | No. of network bonds/volume (nb x1022 atomscm-3) | Theoretical bulk modulus (kbc)GPa | Eopt(dic) (eV) | Eopt(ind) (eV) | Eu (eV) |
| TV-10  | 521                                          | 7.52                                             | 41.64                             | 3.20           | 3.11           | 0.46    |
| TV-7.5 | 516                                          | 7.96                                             | 44.08                             | 3.28           | 3.21           | 0.41    |
| TV-5.0 | 510                                          | 8.43                                             | 46.68                             | 3.31           | 3.24           | 0.36    |
| TV-2.5 | 505                                          | 9.00                                             | 49.84                             | 3.53           | 3.43           | 0.32    |
| TV-0.0 | 500                                          | 9.67                                             | 53.55                             | 3.86           | 3.83           | 0.26    |

Caption: Average stretching force constant (F), number of network bonds/volume, theoretical bulk modulus, direct/indirect band gap and Urbach energy for all glass samples.

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": "521", "type": "Other"}
{"value": "7.52", "type": "Other"}
{"value": "41.64", "type": "Other"}
{"value": "3.20", "type": "Other"}
{"value": "3.11", "type": "Other"}
{"value": "0.46", "type": "Other"}
{"value": "516", "type": "Other"}
{"value": "7.96", "type": "Other"}
{"value": "44.08", "type": "Other"}
{"value": "3.28", "type": "Other"}
{"value": "3.21", "type": "Other"}
{"value": "0.41", "type": "Other"}
{"value": "510", "type": "Other"}
{"value": "8.43", "type": "Other"}
{"value": "46.68", "type": "Other"}
{"value": "3.31", "type": "Other"}
{"value": "3.24", "type": "Other"}
{"value": "0.36", "type": "Other"}
{"value": "505", "type": "Other"}
{"value": "9.00", "type": "Other"}
{"value": "49.84", "type": "Other"}
{"value": "3.53", "type": "Other"}
{"value": "3.43", "type": "Other"}
{"value": "0.32", "type": "Other"}
{"value": "500", "type": "Other"}
{"value": "9.67", "type": "Other"}
{"value": "53.55", "type": "Other"}
{"value": "3.86", "type": "Other"}
{"value": "3.83", "type": "Other"}
{"value": "0.26", "type": "Other"}