Abstract
Intergrowth of clinopyroxenes (augite, A) and pyroxenoids (Fe-rhodonite and pyroxferroite, Pxo) was observed by transmission electron microscopy. The following orientation relationship was found: (001)Pxo is parallel to \((1\mathop {\bar 1}\limits^ + \bar 1)_{\text{A}}\) and \([1\bar 10]_{Pxo}\) is parallel to [011]A. This relationship can be explained by similarities of the structures of clinopyroxenes and pyroxenoids. It contradicts a suggestion based on structural arguments of Koto et al. (1976). Chain periodicity faults parallel to \((1\mathop {\bar 1}\limits^ + \bar 1)\) are also observed in pure clinopyroxenes.
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References
Aikawa N (1979) Oriented intergrowth of rhodonite and pyroxmangite and their transformation mechanism. Mineral J 9:255–269
Burnham CW (1966) Ferrosilite III: A triclinic pyroxenoid-type polymorph of ferrous metasilicate. Science 154:513–516
Burnham CW (1971) The crystal structure of pyroxferroite from Mare Tranquilitatis. Proc 2nd Lunar Sci Conf 1:47–57
Buseck PR, Nord GL Jr, Veblen DR (1980) Subsolidus phenomena in pyroxenes. In: Prewitt CT (ed) Reviews in Mineralogy, Vol 7: Pyroxenes. Mineralogical Society of America, Washington D.C., pp 117–211
Chao ECT, Minkin JA, Frondel C, Klein C Jr, Drake JC, Fuchs L, Tani B, Smith JV, Anderson AT, Moore PB, Zechman GR Jr, Traill RJ, Plant AG, Douglas JSV, Dence MR (1970) Pyroxferroite, a new calcium-bearing iron silicate from tranquility base. Proc Apollo 11 Lunar Sci Conf 1:65–79
Czank M (1981) Chain periodicity faults in babingtonite, Ca2Fe2+ Fe3+H Si5O15. Acta Crystallogr A37:617–620
Czank M, Liebau F (1979) Periodizitätsfehler in Pyroxenoiden — eine neue Art von Baufehlern (elektronenmikroskopische Untersuchungen). Fortschr Mineral 57 Beih 1:23–24
Czank M, Liebau F (1980) Periodicity faults in chain silicates: a new type of planar lattice fault observed with high resolution electron microscopy. Phys Chem Minerals 6:85–93
Jefferson DA, Pugh NJ, Alario-Franco M, Mallinson LG, Millward GR, Thomas JM (1980) The ultrastructure of pyroxenoid chain silicates. I. Variation of chain configuration in rhodonite. Acta Crystallogr A36:1058–1065
Koto K, Morimoto N, Narita H (1976) Crystallographic relationships of the pyroxenes and pyroxenoids. J Jpn Assoc Mineral Petrol Econ Geol 71:248–254
Ohashi Y, Finger LW (1981) The crystal structure of santaclaraite, CaMn4[Si5O14(OH)] (OH)·H2O: the role of hydrogen atoms in the pyroxenoid structure. Am Mineral 66:154–168
Pannhorst W (1979) Structural relationships between pyroxenes. Neues Jahrb Mineral Abh 135:1–17
Prewitt CT, Peacor DR (1964) Crystal chemistry of the pyroxenes and pyroxenoids. Am Mineral 49:1527–1542
Ried H (1982) Über den Realbau von Pyroxenen und Pyroxenoiden: Transmissionselektronenmikroskopische Untersuchungen insbesondere von Kettenperiodizitätsfehlern und Entmischungen. Dissertation, Frankfurt am Main
Ried H, Korekawa M (1980) Transmission electron microscopy of synthetic and natural Fünferketten and Siebenerketten pyroxenoids. Phys Chem Minerals 5:351–365
Ried H, Schröpfer L, Korekawa M (1979) Synthese von Pyroxferroit und Fe-Rhondonit bei niedrigem Druck (<1 atm). Z Kristallogr 149:121–123
Takéuchi Y (1976) Two structural series of pyroxenoids. Proc Jpn Acad 52:122–125
Thompson JB (1978) Biopyriboles and polysomatic series. Am Mineral 63:239–249
Veblen DR (1984) TEM study of a pyroxene to pyroxenoid reaction. Am Mineral (in press)
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Ried, H. Intergrowth of pyroxene and pyroxenoid; chain periodicity faults in pyroxene. Phys Chem Minerals 10, 230–235 (1984). https://doi.org/10.1007/BF00309315
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DOI: https://doi.org/10.1007/BF00309315