Strong ERS (more than 5.6% Th, c. 0.33 mSv/(g x hr)) c. 105 to 106 gamma ray response units (webmineral.com)
Weak ERS (more than 0.56% Th, c. 33 μSv/(g x hr)) c. 104 to 105 gamma ray response units (webmineral.com)
Mild ERS, high (more than 0.056% Th, c. 3.3 μSv/(g x hr)) c. 103 to 104 gamma ray response units (webmineral.com)
Mild ERS, low (more than 0.005,6% Th) c. 102 to 103 gamma ray response units (webmineral.com)
Barely detectable ERS, high (more than 0.000,56% Th) c. 10 to 102 gamma ray response units (webmineral.com)
Barely detectable ERS, medium (more than 0.000,056% Th) c. 1 to 10 gamma ray response units (webmineral.com)
Barely detectable ERS, low (more than 0.000,005,6% Th) c. 0.1 to 1 gamma ray response units (webmineral.com)
Notes: best orientation is the estimated relative mass of some elements (U, Th, Re and Rb; natural isotopic abundance) based on the empirical formula of the type material (mineralienatlas.de and webmineral.com), assuming the mineral is "old" in geological terms (no "recent" genesis). REE-minerals have an estimated 5% Th/REE. Only sensitive detectors are able to detect radioactivity on minerals in the 'mild ERS' and 'barely detectable ERS' range. (Gamma ray response of common clay minerals, the detector is centered in a borehole with a 3 inch standoff; American Petroleum Institute (API): millisievert per hour exposure (one side of a mineral only) = GR(api)/(20,000x365x24); 0.15 millisievert per year exposure (NCRP Report, half of the estimated US-exposure to terrestrial sources) = 200 GR(api)).
Lower density minerals
Organic minerals (combustible)
Significant water loss by drying
Zeolites (free water boils): 34H2O (paulingite series), 30H2O (erionite and mazzite series), 24H2O (heulandite series), 20H2O (clinoptilolite series), 18H2O (ferrierite and lévyne series), 15H2O (faujasite series), 14H2O (garronite series), 13H2O (chabazite and dachiardite series), 12H2O (phillipsite series), 11H2O (gmelinite series)
Valid minerals and polytypes; cubic and pseudocubic, hexagonal and pseudohexagonal, trigonal and pseudotrigonal, orthorhombic and pseudoorthorhombic, tetragonal and pseudotetragonal, monoclinic and pseudoonoclinic, triclinic crystal system.
Note: the superscript '*' refers to 'named after' notable person; Strunz 8 ed., MinDat without numeration by Athena (8); 'Nickel-Strunz' 9 ed., updated 2009 (9); 'Nickel-Strunz' 10 ed., MinDat (10); 'crystal system' (cs) and 'space group' done, mainly. Review after end of April 2015 (r). Solid solutions and revised chemical formula review (*).
Mineral status, approved after 1959 ('A', based on rruff.info/ima): approved minerals, chemical structure was not redefined.
Mineral status, approved and redefined after 1959 ('Rd', based on rruff.info/ima): approved minerals, chemical structure was redefined.
Mineral status, grandfathered ('G', based on rruff.info/ima): grandfathered mineral, publication before 1916, chemical structure was not redefined.
End of April 2015 update (8 ed, 9 ed (update), 10 ed)
Questionable mineral administration
Solid solutions property and revised chemical formula
Questionable status (IMA/CNMNC)
Dimeric minerals: sorosilicates and sorovanadates
Polymeric minerals: frameworks (3-D frameworks, sheets, rings), single chains and multiple chains
For example: schapbachite, rocksalt structural group on rruff.info/ima/ and galena group on "Glossary of Minerals Species" 10 ed, is superseded by "Sulfosalt systematics: a review. Report of the sulfosalt sub-committee of the IMA Commission on Ore Mineralogy" (2008).