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    "label": "Report, OSI - 1/49, Central Intelligence Agency, An Estimate of Swedish Capabilities in Science",
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    "title": "Report, OSI - 1/49, Central Intelligence Agency, An Estimate of Swedish Capabilities in Science",
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        "President's Secretary's Files (Truman Administration)",
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    "seq": 49,
    "pageIndex": 0,
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    "ocrText": "SECRET\n6. CRYSTALLOGRAPHY\nNot unnaturally, Sweden's interest in X rays has led to a fairly strong interest in\ncrystallography, for which X-ray analysis has been the most powerful tool. It may be,\nwith neutron diffraction studies now being exploited in the study of crystal structure,\nthat this fertile field will receive attention in Sweden as soon as an adequate source of\nslow neutrons (e.g., from the thermal column of a pile) is available.\nOf more than passing interest is a study of the crystal structure of barium uranate\nby S. Samson and L. G. Sillen. Evidence is found for the non-existence of the UO4 group.\nRecent work in crystallography includes a study by F. E. Wickman of the crystal\nstructure of lawsonite, CaAl2 (Si2O7) (OH) H2O. Weissenberg photographs have shown\nthat lawsonite is orthorhombic, space group C2221 a=8.88, b=5.75, -13.30 kX, with\nfour \"molecules\" per unit cell.\nIn the same vein C. Brosset has analyzed the crystal structure of Pt (NH3) Br2 Pt-\n(NH3) Br4, with the aid of X rays. The probable space group is Fddd, ==16.36, b=15.42,\nc=11.86 kX, with eight formula units per unit cell.\nA. Lagercrantz and L. G. Sillen found the crystal structure of Bismutite (Bi2O2CO3)\nand beyerite (CaBi2O2 (CO3)2) to be tetragonal with close packing of the o atoms.\nOn the theoretical side, mention should be made of a quantum-mechanical calcu-\nlation by P. O. Lowdin of the cohesive energy, the interionic distance, and the elastic\nconstants of LiCl, NaCl, and KCI. The one-electron approximation was used and reason-\nable agreement with experiment was found. Fock's equations, with wave functions\nof the Heitler-London type, were solved, and the present work was the first approxima-\ntion to higher-order theory.\nFinally, the order-disorder transition point in Fe-Ni3 has been determined by\nO. K. Allback by measuring the resistance of a sample as a function of increasing tem-\nperature.\n7. OTHER TOPICS\nWork on optical spectra is not being neglected. L. Minnhagen has recently pub.\nlished a report on wavelengths and intensities of the lines of Argon II, mostly in the\nultraviolet. B. Edlin has long been a noted spectroscopist and at Uppsala has expended\nspecial effort to extend the accessible range of optical wavelengths down into the X-ray\nregion. A. Lagerquist had studied extensively the near infrared spectrum of beryllium\noxide out to 1.16 microns. L. Huldt has studied the influence of foreign elements on\nthe strength of the lines of a particular element. Band spectroscopy of copper oxide\nhas been reported on by A. Guntsch. B. E. Nilsson has discussed the pressure effect in\nthe 4200 band of AID. A spectrophotometric investigation of molecular bands of CN\nand CH in stars of the late spectral type has been conducted by T. Setterberg at the\nStockholm Observatory. Seventy-one stars of the type F8-M2 have been studied and\nthe results analyzed to show correlation with spectral type and absolute magnitudes.\nSome work in applied mechanics, such as yield points, is indicated in recent pub-\nlications. The names associated with this work are C. Benedicks and R. Skorski.\nThe Physics Institute at the University of Lund has recently been concerned with\nproblems in optics, such as the Stark effect, dispersion in gases, analysis of atomic\nspectra, etc. The following men have participated in the work:\nProf. John Kock\nDr. Sten von Friesen\nDr. L. Minnhagen\nDr. K. Liden\nDr. S. Glad\nDr. L. Stigmark\nSECRET\n42"
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