Summary
Childrenite and crandallite are described as two new phosphate members in the paragenesis of the Stari Trg mine which comprises vivianite, ludlamite and struvite. Crandallite crystals with very simple rhombohedral habit grow on rhombohedral carbonate and childrenite crystals. The crystal morphology of childrenite is very similar to that at described from other localities. Following forms were measured: {100}, {100}, {110}, {120}, {121}, {221} and {342}. The average chemical composition is Ch91 Eo9 (Ch-childrenite, Eo-eosphorite). Pseudo-orthorhombic unit cell dimensions were calculated: a = 10.390(4) A, b = 13.390(4) A and c = 6.920(2) A. Growth sectors and sector twins of childrenite are described.
Zusammenfassung
Childrenit und Crandallit werden als zwei neue Minerale der Phosphatgruppe beschrieben. Sie stammen aus der Stari Trg Grube in Paragenese mit Vivianit, Ludlamit und Struvit. Die Crandallit-Kristalle mit einfachem rhomboedrischen Habitus, wachsen rhomboedrischen Karbonat- und Childrenit-Kristallen auf. Die Kristallmorphologie von Childrenit ist, verglichen mit der aus anderen Lokalitäten, sehr einfach. Folgende Formen wurden gemessen: {100}, {010}, {110}, {120}, {121}, {221} und {342}. Die durchschnittliche chemische Zusammensetzung ist Ch(91Eo9(Ch-Childrenit, Eo Eosphorit). Eine Kalkulation der pseudo-orthorhombischen Elementarzelle ergab folgende Abmessungen: a = 10.390(4) A, b = 13.390(4) A and c = 6.920(2) A. Schließlich wird das Wachstum and die Zwillingsbildung von Childrenit beschrieben.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Akizuki M (1987a) An explanation of optical variation in yugawaralite. Mineral Mag 51: 615–620
Akizuki M (1987b) Al, Si order and the internal texture of prehnite. Can Mineral 25:707–716
Akizuki M, Hampar MS, Zussman J (1979) An explanation of anomalous optical properties of topaz. Mineral Mag 43: 237–241
Akizuki M, Konno H (1985) Order-disorder structure and the internal texture of stilbite. Am Mineral 70: 814–821
Allen FM, Buseck PR (1988) XRD, FTIR, and TEM studies of optically anisotropic grossular garnets. Am Mineral 73: 568–584
Alves KMB, Garg R, Garg VK (1980) A Mössbauer resonance study of Brasilia Childrenite. Radiochem Radioanal Lett 45/2: 129–132
Barić Lj (1962) Ovisnost izmedu pojavljivanja barita i omjera olova prema cinku u olovnocinkanim ležištima Stari Trg (Trepča), Dobrevo (Zletovo), Sasa i Srebrenica, kao i u nekim drugim ležištima u Jugoslaviji (in croatian with extended summary in German). Geološki Glasnik 6: 5–12
Barnes WH (1949) The unit cell and space group of childrenite. Am Mineral 34: 12–18
Barnes WH, Shore VC (1951) The childrenite-eosphorite problem. Am Mineral 36:509–510
Braithwaite RSW, Cooper BV (1982) Childrenite in South-West England. Mineral Mag 46: 119–126
Donnelly TW (1967) Kinetic considerations in the genesis of growth twinning. Am Mineral 52: 1–12
Farmer VC (1974) The infrared spectra of minerals. Mineralogical Society Monograph 4. Mineralogical Society, London, p 539
Fransolet AM (1980) The eosphorite-childrenite series associated with the Li-Mn-Fe phosphate minerals from the Buranga pegmatite, Rwanda. Mineral Mag 43: 1015–1023
Ginzburg A, Voroncova NV (1950) Oxychildrenite a new mineral of the iron-manganesealuminium phosphate group. Dokladi Akademii Nauk SSSR 72:145–148
Giuseppetti G, Tadini C (1984) The crystal structure of childrenite from Tavistock (SW England), Ch89Eo11 term of childrenite-eosphorite series. N Jahrb Mineral Monatsh 6: 263–271
Hanson AW (1960) The crystal structure of eosphorite. Acta Crystallogr 13: 384–387
Hurlbut CS Jr (1950) Childrenite-eosphorite series. Am Mineral 35: 793–805
Hurlbut CS Jr, Aristarain LF (1968) Bermanite, and its occurrence in Cordoba, Argentina. Am Mineral 53:416–431
Lindquist O, Wengelin F (1967) Powder, a program for the refinement of cell dimensions and for the indexing of powder photographs. Gothenburg
Mandarino JA (1976) The Gladstone-Dale relationship, part 1. Derivation of new constants. Canadian Mineralogist 14: 498–502
Moore PB (1973) Pegmatite phosphates: mineralogy and crystal chemistry. Mineral Record 4: 103–130
Seeliger E, Mücke A (1970) Ernstit, ein neues Mn2+Fe3+ Al-Phosphat and seine Beziehungen zum Eosphorit. N Jahrb Mineral Monatsh: 289–298
Van Tassel R, Fransolet AM, Abraham K (1979) Drugmanite, Pb2(Fe3+, Al) (P04)2(OH)H20, a new mineral from Richelle, Belgium. Mineral Mag 43: 463–467
Visser JW (1969) A fully automatic program for finding the unit cell from Powder Data. J App Crystallogr 2: 89–95
Vogel IA (1961) A text-book of quantitative inorganic analysis including elementary instrumental analysis, 3rd ed. Longmans, London, p 1216
Yvon K, Jeitscho W, Parthe E (1977) Lazy Pulverix, a program to calculate theoretical X-ray and neutron powder diffraction patterns. J App Crystallogr 10: 73–74
Author information
Authors and Affiliations
Additional information
With 4 Figures
Rights and permissions
About this article
Cite this article
Bermanec, V., Šćavničar, S. & ZebeC, V. Childrenite and crandallite from the Stari Trg mine (Trepča), Kosovo: new data. Mineralogy and Petrology 52, 197–208 (1995). https://doi.org/10.1007/BF01163245
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF01163245