Studio portrait of Joseph Molling and business partner Ernst Joachim (?); Hannover, Germany.

Digital Image

Max Molling; Hannover, Germany.

Reproduction of an illustration which appeared in the 1927 Commercial Directory

Studio portrait of Josef Molling's fraternity; Heidelberg, Germany.

Josef Molling is sitting on the left

Adolf and Henny Molling nee Meyerhof with Benno Molling's wife Sophie Molling nee Reuben and an unknown woman; Bad Nauheim, Germany.

Postcard written to Therese Gottschalk nee Molling at Norderney

Margarete "Gretchen" Molling nee Benjamin holding her baby son Peter Adolf Molling.

Digital Image

Kaufhaus M. Molling; Hannover, Germany.

This illustration appeared in an article in the "Hannoversche Allgemeine Zeitung" on December 5, 1994.

Studio portrait of Fritz Gottschalk as a young man; Hannover, Germany.

Digital Image

Studio portrait of Julius Krakauer as a young man; Landeshut (Kamienna Gora), Schlesia.

Digital Image

Studio portrait of Adolf Rothschild and Sophie Rothschild nee Cohn.

Digital Image

In Situ Phase Separation Following Dehydration in Bimetallic Sulfates: A Variable-Temperature X-Ray Diffraction Study

Phase separation resulting in a single-crystal-single-crystal transition accompanied by a polycrystalline phase following the dehydration of hydrated bimetallic sulfates [Na2Mn1.167(SO4)(2)S0.33O1.167 center dot 2H(2)O and K4Cd3-(SO4)(5)center dot 3H(2)O] has been investigated by in situ variable-temperature single-crystal X-ray diffraction. With two examples, we illustrate the possibility of generating structural frameworks following dehydration in bimetallic sulfates, which refer to the possible precursor phases at that temperature leading to the mineral formation. The room-temperature structure of Na2Mn1.167(SO4)(2)S0.33O1.167 center dot 2H(2)O is trigonal, space group R (3) over bar. On heating the crystal in situ on the diffractometer, the diffraction images display spherical spots and concentric rings suggesting phase separation, with the spherical spots getting indexed in a monoclinic space group, C2/c. The structure determination based on this data suggests the formation of Na2Mn(SO4)(2). However, the diffraction images from concentric rings could not be indexed. In the second example, the room-temperature structure is determined to be K4Cd3(SO4)(5)center dot 3H(2)O, crystallizing in a monoclinic space group, P2(1)/n. On heating the crystal in situ, the diffraction images collected also have both spherical spots and diffuse rings. The spherical spots could be indexed to a cubic crystal system, space group P2(1)3, and the structure is K4Cd3(SO4)(3). The possible mechanism for the phase transition in the dehydration regime resulting in this remarkable single-crystal to single-crystal transition with the appearance of a surrogate polycrystalline phase is proposed.

Kartel Convent (KC) Jewish fraternity at the University of Heidelberg; Heidelberg, Germany.

Thomas Krakauer's father, Hans Krakauer is second from left in the rear row.

Studio portrait of the Amram family; Buffalo, New York.

The Amrams are related to Hans Krakauer's maternal family the Mayer/Heumann's from Billigheim and Hoffenheim

Elizabeth Krakauer nee Gottschalk in an unknown early Krakauer apartment.

Digital Image

Family portrait taken in a garden on the 75th birthday of Henriette Gottschalk nee Rothschild.

Front row, from left to right: Fritz Gottschalk, Walter Gottschalk, Kurt Gottschalk, Ursula Gottschalk, Hans Ludwig (Hal) Gottschalk, Rudolf Gottschalk, Elizabeth Gottschalk; babies, from left to right: Ilse Gottschalk, Freddy Gottschalk; adults, from left to right: Karl Gottschalk, Elisabeth Gottschalk nee Steinfeld, Ernst Gottschalk, Henriette Gottschalk nee Rothschild, Therese Gottschalk nee Molling, Fritz Joseph Gottschalk

Studio portrait of Elizabeth Krakauer nee Gottschalk; Hannover, Germany.

Digital Image