... of Lower Paleozoic platform margin. The upward-shallowing platform sequence consists of shallow subtidal ribbon-laminated carbonates (Patterson Member) overlain by shoal water to tidal flat massive dolomites and fenestral cryptalgal carbonates (Austinville and Ivanhoe Members) that pass up into red...

...J. KEITH RIGBY; GORDEN L. BELL, JR.; KIRSTEN THOMPSON Abstract A small faunule of silicified hexactinellid sponges and root tufts has been recovered from the upper Guadalupian Reef Trail Member of the Bell Canyon Formation, from the Patterson Hills, in the southwestern part of the Guadalupe...

...M. M. Qurashi; W. H. Barnes Abstract Descloizite, Pb(Zn, Cu)(VO 4 )(OH), and conichalcite, CaCu(AsO 4 )(OH), are typical members of the descloizite and adelite groups of minerals, respectively, and the determination of the structures of the individual members of both groups is dependent...

... numbers of the atoms are in the ratio As:Ca:0:B:H=33:20:8:5:l, so that the Patterson peaks are dominated by the atom pairs containing As as one member of the pair. Since there are only two As in a body-centered cell, one As can be arbitrarily assigned to the origin. Then the major peaks of the Patterson...

..., 2.02 and 1.53 Å, respectively. Single-crystal laser-Raman spectroscopy is used to describe the vibrational properties. The new mineral may be considered a dimorph of kintoreite, ideally PbFe 3 (PO 4 ) 2 (OH,H 2 O) 6 , a member of the alunite super-group. The structure is, however, only remotely...

... (Des Moines) Member of the Hermosa Formation. The reservoir is developed from limestones and dolomites associated with the deposition of algal (Ivanovia) mounds. The porous section ranges from 30 to 104 ft (9 to 32 m) thick, using a 7% porosity cutoff (as indicated on a compensated neutron log...

... and a very good {010} cleavage; twinning along the (301̅) plane produces “L” forms. The three strongest lines in the simulated powder diffraction pattern ( d obs , I , hkl ) are: 2.65 Å, 100.0, (213, 4̅13); 1.91 Å, 48.3, (223, 4̅23, 821); 2.90 Å, 44.9, (6̅03, 6̅12). The structure was solved by Patterson...

...Brian Paul Moore; Takaharu Araki; Subrata Ghose Abstract Hyalotekite, ca . Pb 2 Ba 2 Ca 2 [B 2 (Si 1 1/2 Be 1/2 )Si 8 O 28 ]F, Z = 2, a = 11.310(2), b = 10.955(2), c = 10.317(3)Å, α = 90.43(2)°, β = 90.02(2)°, γ = 90.16(2)°, space group I 1 from Långban, Sweden was determined by Patterson...

...} \begin{document} \({\bar{2}}\) \end{document} , 420); 3.079, 65 ,(222, 511); 2.976, 45 ,(113). The crystal structure was solved by Patterson methods and refined using 2045 observed reflections to R 1( F )= 3.73%. The structure is characterized by a kinked, five-membered chain of edge-sharing M φ 6 (φ...

.... The structure was solved through a combination of direct methods and the Patterson synthesis, and refined to a final R factor of 6.8 percent. The crystal structure consists of tetrahedral sheets interlayered with octahedral chains. The tetrahedral Si 6 O 15 sheets are obtained by interconnecting a “Dreierkette...

...P. B. Moore; T. Araki Abstract A single crystal of magnussonite, end-member formula unit Mn 18 2+ [ As 6 3+ Mn 18 1+ O] 2 Cl 2 , was studied in detail by three-dimensional X-ray diffractometry. The mineral is cubic, space group laid, Z = 8, a = 19.680(4)A. R = 0.112 (R w = 0.097) for 1373...

... has been determined through a combination of the three-dimensional Patterson and the symbolic addition methods. The structure has been refined by the method of least squares to an R factor of 0.032 for 4243 reflections. The crystal structure of inesite consists of two components: (a) a polyhedral band...

...Eric Dowty Abstract The crystal structure of monoclinic joaquinite, ideal formula NaFe 2+ Ba 2 RE 2 Ti 2 Si 8 O 26 OH·H 2 O, has been determined by the Patterson method from 2630 diffractometer data, and refined by least-squares to a weighted R of 0.075. The space group is C 2, and cell parameters...

...G. Y. CHAO Abstract Carletonite, a new mineral from Mont St. Hilaire, Quebec, is tetragonal P4/mbm , with a = 13.178 Å, c = 16.695 Å, and z = 4. The structure was solved by threedimensional Patterson synthesis and refined by full-matrix least-squares method using anisotropic temperature parameters...

...Paul B. Moore Abstract Leucophoenicite, a 10.842 (19), b 4.826 (6), c 11.324 (9) Å, β 103.93° (9), P2 1 /a, possesses the crystallochemical formula Mn 7 [SiO 4 ] 2 [(SiO 4 )(OH) 2 ], with two formula units in the crystal cell. The atomic arrangement was deciphered from Patterson synthesis; atomic...

...Forrest L. Lenker Abstract Dr. Thomas presided, with 52 members and visitors present. Dr. Daniel L. O’Connell of the College of the City of New York addressed the Society on “The Saurel Symbols for the 32 Crystal Classes.” By the use of only a center of symmetry, axes of symmetry, and inversion...

...Leroy Fish ABSTRACT The purpose of this discussion is to carry the section from the top of the Jackson (where Patterson’s paper stopped) through the Frio, Catahoula, and Oakville formations; to make a subdivision of the Catahoula; and to point out the occurrence of the Oakville formation...