TABLE 3.1Asbestos Minerals

Mineral Group Mineral Species Asbestiform Variety Ideal Chemical Formulaa
Serpentine Clinochrysotile Chrysotile Mg3Si2O5(OH)4
Serpentine Orthochrysotile Chrysotile Mg3Si2O5(OH)4
Serpentine Parachrysotile Chrysotile Mg3Si2O5(OH)4
Amphibole Riebeckite Crocidolite Na2Fe5Si8O22(OH)2
Amphibole Grunerite Amosite (FeMg)7Si8O22(OH)2
Amphibole Cummingtonite Amosite (MgFe)7Si8O22(OH)2
Amphibole Gedrite Amosite (MgFe)5Al2(Si6Al2)O22(OH)2
Amphibole Anthophyllite Asbestiform anthophyllite (MgFe)7(Si)8O22(OH)2
Amphibole Tremolite Asbestiform tremolite Ca2Mg5Si8O22(OH)2
Amphibole Actinolite Asbestiform actinolite Ca2(MgFe)5Si8O22(OH)2
Amphibole Richterite Asbestiform richterite Na2Ca(MgFe)5Si8O22(OH)2
Amphibole (Alumino)winchite Asbestiform winchite CaNa(MgFe)4AlSi8O22(OH)2
Amphibole Ferriwinchite Asbestiform winchite CaNa(FeMg)4Fe3+Si8O22(OH)2
a

Simplified representation of the overall stoichiometry of a mineral species. Mineral species typically have chemical modifications, such as substitutions of similar cations and sometimes anions (common examples are Mg2+<->Fe2+ and Si4+<->Al3+). Substitutions may cause substantiated deviations from the ideal chemical formula. Limits of chemical variation are defined for each mineral species in Table 3.2.

SOURCE: Gaines et al. 1997.

Simplified representation of the overall stoichiometry of a mineral species. Mineral species typically have chemical modifications, such as substitutions of similar cations and sometimes anions (common examples are Mg2+<->Fe2+ and Si4+<->Al3+). Substitutions may cause substantiated deviations from the ideal chemical formula. Limits of chemical variation are defined for each mineral species in Table 3.2.

From: 3, Background Information on Asbestos

Cover of Asbestos
Asbestos: Selected Cancers.
Institute of Medicine (US) Committee on Asbestos: Selected Health Effects.
Washington (DC): National Academies Press (US); 2006.
Copyright © 2006, National Academy of Sciences.

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