Table 6 Quantitative chemical erionite identification criteria and the number of fibers met the criteria in this study.

From: Determining factors affecting the accuracy of SEM-EDX data-based quantitative chemical analysis for identifying naturally occurring individual carcinogenic erionite fibers

Criteria

Reference value

Number of fibers (total N = 325)

Si + Al

≈ 36

282

Tsi (Si/ (Si + Al)

0.68–0.79

43

Mg/ (Ca + Na)

< 0.15

NA

Mg content (72O)

< 0.8

93

Charge balance E%

≤ ±20

78

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