这是什么？
A mica-like mineral that unfolds into a concertina when heated, becoming light, fireproof and full of air.
为何重要？
Exfoliated vermiculite insulates, lightens concrete and holds water in potting compost. Historic contamination of one deposit with asbestos shaped the modern testing regime.
该材料的深度文字内容尚未发布。以下所有内容均直接提取自原始数据集，内容完整。
正确读取数据。
Gross weight of concentrate.
Concentrate by particle grade, exfoliated near the point of use.
生产主体
在地图上查看 →Mine production
Mine productionthousand metric tons 2025 (估计值) 全球合计 460.0 thousand metric tons
USGS Mineral Commodity Summaries 2026 · Gross weight of concentrate. · 来源 ↗
横向滚动表格以查看其余列。
| 国家/地区 | 产量 | 占全球份额 |
|---|---|---|
| South Africa | 160.0 | 34.8% |
| United States | 100.0 | 21.7% |
| Brazil | 50.00 | 10.9% |
| Russia | 40.00 | 8.7% |
| China | 40.00 | 8.7% |
| Zimbabwe | 30.00 | 6.5% |
| Uganda | 20.00 | 4.3% |
| Bulgaria | 10.00 | 2.2% |
| Turkey | 10.00 | 2.2% |
| India | 2.00 | 0.4% |
| Uzbekistan | 1.00 | 0.2% |
| Mexico | s | — |
| 全球合计 | 460.0 | 100% |
"未披露"表示美国地质调查局（USGS）为避免泄露单个企业数据而对该数字进行了保密处理——并不意味着数值为零。各国行数之和不一定等于世界合计，原因在于来源对每个数字单独进行四舍五入处理，且并不总是单独列出"其他国家/地区"一行。
储量持有方
"储量"是一个严格的术语。它是指已知矿床中，按当前价格和当前技术，在经济上可行的可采部分——而非地下所有存量。当价格上涨或新工艺出现时，储量增加；当价格下跌时，储量减少。
Reserves
Reservesthousand metric tons 2025
USGS Mineral Commodity Summaries 2026 · 来源 ↗
| 国家/地区 | 储量 | 占全球份额 |
|---|---|---|
| United States | 25,000 | — |
| South Africa | 14,000 | — |
| Turkey | 11,000 | — |
| Brazil | 6,600 | — |
| China | 2,900 | — |
| India | 1,600 | — |
| Russia | Not applicable | — |
| Bulgaria | Not applicable | — |
| Mexico | Not applicable | — |
| Uganda | Not applicable | — |
| Uzbekistan | Not applicable | — |
| Zimbabwe | Not applicable | — |
| 全球合计 | Not applicable | 100% |