...Jacek Wachowiak; Adam Pieczka Abstract Motukoreaite, Mg 6 Al 3 (OH) 18 [Na(H 2 O) 6 ][SO 4 ] 2 ·6H 2 O, is a poorly-known, rare layered double hydroxide mineral belonging to the wermlandite group in the hydrotalcite supergroup. It was found in abundant quantities (at least hundreds of thousands...

...Isabel Zamarreño; Feliciano Plana; Antonio Vazquez; David A. Clague Abstract Motukoreaite occurs in fractures and amygdules in hyaloclastite dredged from the western Mediterranean. Motukoreaite apparently forms as a low-temperature alteration product during seawater-basaltic glass interaction. We...

... supergroup are included in the discussion. (4) Jamborite, carrboydite, zincaluminite, motukoreaite, natroglaucocerinite, brugnatellite and muskoxite are identified as questionable species which need further investigation in order to verify their structure and composition. (5) The ranges of compositions...

... 4 ) 2 (OH) 18 (H 2 O) 12 , and motukoreaite, ideally Na Mg 6 Al 3 (SO 4 ) 2 (OH) 18 (H 2 O) 12 . Abstract Nous avons affiné la structure de la nikischerite, Na Fe 2+ 6 Al 3 (SO 4 ) 2 (OH) 18 (H 2 O) 12 , rhomboédrique, a 9.347(1), c 33.000(7) Å, V 2497(3) Å 3 , Z = 3, R 3̅, jusqu’à un résidu R...

... of motukoreaite- and natroglaucocerinite-like phases with compositions M 6 Al 3 (OH) 18 Na(H 2 O) 6 (SO 4 ) 2 ⋅6H 2 O and M 6 Al 3 (OH) 18 K(H 2 O) 6 (SO 4 ) 2 ⋅6H 2 O ( M  = Mg and Zn) revealed that the 3 R polytype is the most stable structural modification of these compounds and showed that Na + can...

...+) analogue of motukoreaite. © 1996 Mineralogical Association of Canada 1996 Mineralogical Association of Canada ...

..., motukoreaite (1977), and several records of rare or unusual minerals (e.g. aguilarite, awaruite, baricite, bayerite and doyleite, dahlite and whitlockite, terrugite and nobleite, and uricite). Most are jointly authored with the finder who arrived with the ‘unknown’ sample in hand. As an undergraduate Kerry...

... Mg 2.00 0.33 CO 3 C2/ m 4 motukoreaite Mg 1.32 0.43 SO 4 , CO 3 R 3̄ m 5 meixnerite Mg 3.00 0.25 OH R 3̄ m 6 chlormagaluminite Mg 2.00 0.33 Cl, CO 3 P 6/ mcm , P 6 cm , P 6̄ c 2 7 caresite Fe 2.00 0.33 CO 3 P 3 1 12– P 3 1 12 2...

... to the superstructure resolution of the double layer mineral motukoreaite . Neues Jahrbuch für Mineralogie , 6 , 263 – 272 . Sheldrick , G.M. ( 2008 ) A short history of SHELX . Acta Crystallographica , A64 , 112 – 122 . Sideris , P.J. , Nielsen , U.G. , Gan , Z.H. and Grey , C.P...

..., Norway. The mineral, which is the Fe 3+ analog of shigaite and motukoreaite, occurs on and within a clay matrix containing pyrite, pyrrhotite, siderite, cronstedtite, and vivianite in specimens from the Huanuni tin mine, Dalence Provice, Oruro, Bolivia. The new mineral name is for mineral dealer...

....%. Empirical formula: Na 0.85 Fe 6.55   2+ Al 3.04 (SO 4 ) 1.83 (OH) 19.41 ·11.30H 2 O. Relationship to other species : It is the Fe 2+ -dominant analogue of shigaite, NaMn 6   2+ Al 3 (SO 4 ) 2 (OH) 18 ·12H 2 O, and motukoreaite, NaMg 6 Al 3 (SO 4 ) 2 (OH) 18 ·12H 2 O. Name : After Anthony (Tony) J...

... – ? 25a,b,c (1) motukoreaite Na 0.6 [Mg 5.6 Al 3.4 (OH) 18 ](SO 4 ,CO 3 ) 2 (H 2 O) 12 9.172 a 33.510 – R 3̅ m 25a,b,c [3] shigaite Na[AlMn 2+ 2 (OH) 6 ] 3 (SO 4 ) 2 (H 2 O) 12 9.512 a 33.074 – R 3̅ 25a,b,c [4] wermlandite [Mg 7 (Al,Fe 3+ ) 2 (OH) 18 ](Ca,Mg)(SO 4...