Reference:
▪ Mills, S.J., Christy, A.G., Schmitt, R.T. (2016): The creation of neotypes for hydrotalcite. Mineralogical Magazine, 80, 1023-1029.
Abstract:
Two samples of hydrotalcite, likely worked on by Carl Christian Hochstetter, have been discovered in the Museum für Naturkunde Berlin and given neotype status by the IMA CNMNC (proposal 15-J). The two samples from Snarum, Norway, have been reanalyzed and give Mg5.84Al2.07Fe0.09(OH)16(CO3)1.08·4H2O and Mg5.75Al2.21Fe0.04(OH)16(CO3)1.12·4H2O. Both samples have a mix of the two polytypes 3R/2H in the ratio of 69.2/30.8 and 69.5/30.5%. A discussion of hydrotalcite and hydrotalcite-like phase occurrences in the literature is also presented.
▪ Mills, S.J., Christy, A.G., Schmitt, R.T. (2016): The creation of neotypes for hydrotalcite. Mineralogical Magazine, 80, 1023-1029.
Abstract:
Two samples of hydrotalcite, likely worked on by Carl Christian Hochstetter, have been discovered in the Museum für Naturkunde Berlin and given neotype status by the IMA CNMNC (proposal 15-J). The two samples from Snarum, Norway, have been reanalyzed and give Mg5.84Al2.07Fe0.09(OH)16(CO3)1.08·4H2O and Mg5.75Al2.21Fe0.04(OH)16(CO3)1.12·4H2O. Both samples have a mix of the two polytypes 3R/2H in the ratio of 69.2/30.8 and 69.5/30.5%. A discussion of hydrotalcite and hydrotalcite-like phase occurrences in the literature is also presented.