bluuebunny/crossref_metadata_2025_split huggingface dataset:
Two macroscopic and microscopic brain imaging studies of human hippocampus in early Alzheimer's disease and schizophrenia research
Authors: Lange Nicholas , Lake Stephen , Sperling Reisa , Brown John , Routledge Carol , Albert Marilyn , Heckers Stephan 
Published: January 2004

AbstractAmong the many diseases that affect the hippocampus, a small yet highly important brain region responsible for memory and identity, Alzheimer's disease and schizophrenia are among the most devastating. We describe a two‐stage, region‐of‐interest based linear mixed model approach to the analysis of a longitudinal functional magnetic resonance (FMRI) study of human memory function under several drug challenges. We then describe a Monte Carlo approach to testing members of nested hierarchies of linear models in a stereological study of different types and locations of human hippocampal neurons. Last, we attempt to draw the attention of the biostatistical community interested in imaging neuroscience to the intriguing complexities of human hippocampal research in early Alzheimer's disease, schizophrenia and other brain diseases via brain imaging methods. Copyright © 2004 John Wiley & Sons, Ltd.
Managing and analysing data from a large‐scale study on Framingham Offspring relating brain structure to cognitive function
Authors: Massaro Joseph M. , Srem Ralph B. D'Agostino , Sullivan Lisa M. , Beiser Alexa , DeCarli Charles , Au Rhoda , Elias Merrill F. , Wolf Philip A 
Published: January 2004

AbstractAt the Framingham Heart Study under separate research grant funding from the National Institute of Aging, NIH, we are gathering brain structure and cognitive information on the Framingham Offspring, creating one of the largest known data sets to assess changes in brain structure associated with normative ageing and cognitive decline. Subject recruitment, data collection, data management and statistical analysis require a collaborative integrated effort on the part of the Framingham project team. Here we describe this effort, as well as the various brain structure and cognitive function parameters we are now collecting. We are currently performing analyses of data collected through 2002, and we discuss the statistical issues arising relating brain structure parameters to cognitive function. Copyright © 2004 John Wiley & Sons, Ltd.
Global and political strategies in deregulated industries: the asymmetric behaviors of former monopolies
Authors: Bonardi Jean‐Philippe 
Published: January 2004

AbstractIn deregulated industries former monopolies often adopt asymmetric behaviors: these firms impede the entry of foreign competitors in their home market, especially using defensive political strategies, and, at the same time, aggressively develop international strategies in foreign markets. To account for this behavior, I develop a game theoretic model involving three players: the former monopoly, its home government, and the host government of the country into which the firm wants to enter. I show first that there are in fact different asymmetric strategies that former monopolies can use in such a setting, and that a global strategy cannot always be implemented by those firms because of cooperation issues between the two governments. I also study the conditions under which these issues can be solved and show that this can happen only when the firm develops a political strategy that integrates both defensive and offensive activities. Overall, this paper therefore argues that asymmetric strategies are not always adopted to maintain monopoly rents but are also dictated by the nature of the international relationships between the governments involved. Copyright © 2003 John Wiley & Sons, Ltd.
Entry in the presence of dueling options
Authors: Folta Timothy B. , O'Brien Jonathan P. 
Published: January 2004

AbstractThis paper investigates the influence of industry uncertainty on the decision by established firms to enter a new industry. Specifically, we examine the tension between the option to defer, which discourages entry in the presence of uncertainty, and the option to grow, which may encourage entry in the presence of uncertainty when there are early mover advantages. Empirical analysis on data from a broad array of industries revealed that the effect of uncertainty on entry is not monotonic. Our findings are the first to find support for the nonmonotonic effect of uncertainty that has only recently emerged in theoretical treatments of real options theory, and amplify the importance of considering both the option to defer and the option to grow when contemplating entry. Furthermore, we found evidence that the relationship between uncertainty and entry is moderated by: (a) irreversibility, which influences the value of the option to defer; (b) the total value of growth opportunities; and (c) early mover advantages, which magnify the value of growth options. Copyright © 2003 John Wiley & Sons, Ltd.
Strategy and industry effects on profitability: evidence from Greece
Authors: Spanos Yiannis E. , Zaralis George , Lioukas Spyros 
Published: January 2004

AbstractThe present study examines the impact of firm and industry‐specific factors on profitability, using census data on Greek manufacturing. At the firm level, particular attention is given to strategy effects. Based on a modification of Porter's typology, these effects are captured through different forms of both ‘pure’ and ‘hybrid’ strategies. Industry effects are represented using industry concentration, entry barriers, and growth. Hypotheses are developed taking into account both previous research and the particular idiosyncrasies of the national context. The results obtained provide important insights on specific determinants of firm profitability. With respect to strategy, results confirm the hypothesis that hybrid strategies are clearly preferable compared to pure ones. In addition, it was found that the more generic strategy dimensions are included in the strategy mix, the more profitable the strategy is, provided that one of the key ingredients is low cost. Industry‐level effects, although weaker, show strong impact of industry entry barriers. Moreover, the findings suggest that while both sets of factors significantly contribute to firm profitability, firm‐specific factors explain more than twice as much profit variability as industry factors. Copyright © 2003 John Wiley & Sons, Ltd.
Sorting things out: valuation of new firms in uncertain markets
Authors: Sanders Wm. Gerard , Boivie Steven 
Published: January 2004

AbstractNew business models combined with a lack of objective operating data result in significant information asymmetry and uncertainty in the valuation of new firms in emerging markets. Information asymmetry increases the risks of both adverse selection and moral hazard. When traditional differentiators of firm quality are lacking, such as in emerging economic sectors, markets may turn to secondary information sources to filter and sort firms. We investigate the roles played by observable corporate governance characteristics as indirect indicators of new firms' potential qualitative differences. Markets may sort firms based on such characteristics because they are perceived to be correlated with desired but unobservable characteristics and actions and they lower the risks of both adverse selection and moral hazard. Our study of publicly traded U.S. Internet firms found that firm market valuation was strongly associated with corporate governance characteristics (e.g., executive and director stock‐based incentives, institutional and blockholder stock ownership, board structure, and venture capital participation). In addition, firm age moderated how markets used some quality proxies to determine firm valuation during the post‐IPO period. Copyright © 2003 John Wiley & Sons, Ltd.
Meta‐analyses of post‐acquisition performance: indications of unidentified moderators
Authors: King David R. , Dalton Dan R. , Daily Catherine M. , Covin Jeffrey G. 
Published: January 2004

AbstractEmpirical research has not consistently identified antecedents for predicting post‐acquisition performance. We employ meta‐analytic techniques to empirically assess the impact of the most commonly researched antecedent variables on post‐acquisition performance. We find robust results indicating that, on average and across the most commonly studied variables, acquiring firms' performance does not positively change as a function of their acquisition activity, and is negatively affected to a modest extent. More importantly, our results indicate that unidentified variables may explain significant variance in post‐acquisition performance, suggesting the need for additional theory development and changes to M&A research methods. Copyright © 2003 John Wiley & Sons, Ltd.
Synthesis, Crystal Structure and Properties of Rubidium Dihydrogentricyanomelaminate Semihydrate Rb[H2C6N9] · 1/2 H2O
Authors: Jürgens Barbara , Höppe Henning A. , Schnick Wolfgang 
Published: January 2004

AbstractRubidium dihydrogentricyanomelaminate semihydrate Rb[H2C6N9] · 1/2 H2O was obtained as colorless rod‐like single crystals from a solution of Rb3[C6N9] · H2O and 0.1 M HCl after water evaporation at room temperature. According to the X‐ray single‐crystal structure determination (Rb[H2C6N9] · 1/2 H2O: C2/c (no. 15), a = 2007.4(3) pm, b = 512.2(1) pm, c = 2168.0(4) pm, β = 111.66(2)°, Z = 8, R1 = 0.059, 2391 independent reflections, 159 parameters) Rb+ and cyclic planar [H2C6N9]— ions as well as hydrate water molecules occur in the crystal. Rb[H2C6N9] · 1/2 H2O was investigated by FTIR and Raman spectroscopy, TG measurements and temperature‐dependent X‐ray powder diffraction. According to the thermoanalytic investigations, dehydration of Rb[H2C6N9] · 1/2 H2O starts above 60 °C and is finished below 250 °C.
Ab Initio High Pressure Investigations of InI
Authors: Becker Daniel , Beck Horst P. 
Published: January 2004

AbstractThe high pressure behaviour of InI is studied by DFT‐calculations and compared with experimental data. The existence of a 5s2 electron pair in In+ represents an unfavourable bonding situation for high symmetry structures because of effective closed shell repulsion. Since cations with a ns2 electron pair are highly polarizable and the electronic situation is more favourable in the low symmetry structure InI prefers a TlI‐type structure at ambient pressure. A pressure induced transition to the more densely packed high symmetry CsCl‐type structure takes place at about 19 GPa according to our calculations.At ambient pressure the interactions are predominantly ionic. However with increasing pressure the distances between In+ cations in the TlI‐type structure diminish drastically, mainly due to the changing space requirement of the lone electron pair. Apart from ionic interactions further bonding interactions between the In+ cations occur. At elevated pressure the electron localization function (ELF) as well as the band structure diagrams suggest metallic bonding between the In+ within the zigzag chain, i. e. increasing bonding interactions between the In+ cations due to the electron pair and its s‐p‐mixing. At ambient pressure In‐In interactions are rather weak and the space requirement of the lone electron pair mainly determines the characteristic arrangement of the ions. At elevated pressure the In‐In interactions become stronger and stabilise themselves additionally the specific structural arrangement.
Synthese und Kristallstrukturen neuer komplexer Chloride der Lanthanide mit 3, 5‐Dimethylpyridiniumkationen: (3, 5‐Dimethylpyridinium)2[LnCl4(H2O)2]Cl (Ln = La, Pr) und (3, 5‐Dimethylpyridinium)3[TbCl6]
Authors: Hallfeldt Jens , Urland Werner 
Published: January 2004

AbstractKristalle der komplexen Chloride (3, 5‐Dimethylpyridinium)2[LaCl4(H2O)2]Cl (1), (3, 5‐Dimethylpyridinium)2[PrCl4(H2O)2]Cl (2) und (3, 5‐Dimethylpyridinium)3[TbCl6] (3) konnten durch Reaktion von LnCl3 · x H2O (Ln = La, Pr, Tb; x = 6‐7) mit 3, 5‐Dimethylpyridiniumchlorid in ethanolisch/butanolischer Lösung dargestellt und die Kristallstrukturen anhand von röntgenographischen Einkristalldaten ermittelt werden.Die Verbindungen 1 und 2 sind miteinander isotyp und kristallisieren triklin in der Raumgruppe P1¯ (Z = 2). Die 3, 5‐Dimethylpyridiniumionen werden über Wasserstoffbrückenbindungen mit der anionische Teilstruktur bestehend aus Strängen kantenverknüpfter Trigondodekaeder [LnCl4/2Cl2(H2O)2]— und isolierten Chloridionen verknüpft. Die organischen Einheiten sind nach Art eines “π‐stackings” angeordnet.3 kristallisiert monoklin in der Raumgruppe P21/c (Z = 4). In der Kristallstruktur liegen oktaedrische Koordinationspolyeder der Zusammensetzung [TbCl6]3— vor. Die Oktaeder sind über Wasserstoffbrückenbindungen mit den organischen Kationen zu Strängen parallel [0 0 1] verknüpft.
Bariumstannat‐Pulver durch hydrothermale Synthese und durch Thermolyse von Bariumzinn(IV)‐glykolaten. Synthese und Struktur von [Ba(C2H6O2)4][Sn(C2H4O2)3] und [Ba(C2H6O2)2][Sn(C2H4O2)3]·CH3OH
Authors: Jäger Lothar , Lorenz Volker , Müller Thomas , Abicht Hans‐Peter , Rössel Michael , Görls Helmar 
Published: January 2004

AbstractDurch hydrothermale sowie mikrowellenassistierte hydrothermale Reaktion von SnO2·aq mit Bariumhydroxid entsteht Ba[Sn(OH)6] (1) in Form stäbchenförmiger Partikel. Verbindung 1 gleicher Morphologie kann auch durch hydrothermale Umsetzung von [Ba(C2H6O2)4][Sn(C2H4O2)3] (3) gewonnen werden. Durch Umsetzung von SnO2·aq mit Ba(OH)2·8H2O in Ethylenglykol erhält man das Glykolat [Ba(C2H6O2)4][Sn(C2H4O2)3] (3), das durch Rekristallisation aus Methanol [Ba(C2H6O2)2][Sn(C2H4O2)3]· CH3OH (4) bildet.Die Verbindungen 1, 3 und 4 liefern bei unterschiedlichen Temperaturen BaSnO3‐Pulver (2) unterschiedlicher Morphologie; aufgrund der Korngröße der resultierenden Pulver sind die Verbindungen 3 und 4 als Precursor für die Herstellung von Keramiken geeignet.
The Solid Solution MgxIn3—xIr — Formation of the FeGa3 Type up to x = 0.73 and the Cementite Structure with x = 0.92
Authors: Hlukhyy Viktor , Hoffmann Rolf‐Dieter , Pöttgen Rainer 
Published: January 2004

AbstractVarious compounds within the solid solution MgxIn3—xIr (x = 0—0.92) have been prepared from the elements by melting in glassy carbon crucibles in a water‐cooled sample chamber in a high‐frequency furnace. The structures of six single crystals with x = 0.25, 0.58, 0.62, 0.64, 0.71, and 0.73 have been refined from X‐ray diffractometer data. These intermetallics crystallize with the tetragonal FeGa3 structure, space group P42/mnm: a = 700.6(1), c = 709.1(1) pm, wR2 = 0.0397, 296 F2 values, 18 parameters for Mg0.73In2.27Ir. This structure is an intergrowth of AlB2 and >W related slabs. The 4c and 8j indium sites show mixed occupancy with magnesium. For all crystals the 4c site within the cubes has a higher magnesium population. With increasing magnesium content, a switch in the structure type is observed. Mg0.92In2.08Ir adopts the Fe3C structure, space group Pnma: a = 745.5(3), b = 837.7(3), c = 514.2(2) pm, wR2 = 0.0724, 738 F2 values, 25 parameters. The iridium atoms are coordinated by eight (FeGa3 type) and nine (Fe3C type) indium/magnesium atoms in both structure types. The FeGa3 and the Fe3C type both derive from the aristotype U3Si2 as presented by a group‐subgroup scheme.
Die Kristallstrukturen von Hexachalcogeno‐Hypodiphosphaten des Magnesiums und Zinks
Authors: Jörgens Stefan , Mewis Albrecht 
Published: January 2004

AbstractEs wurden fünf Chalcogeno‐Hypodiphosphate dargestellt und röntgenographisch mit Einkristallmethoden charakterisiert. Mg2P2S6 (C2/m; a = 6, 085(1), b = 10, 560(2), c = 6, 835(1)Å, β = 106, 97(3)°; Z = 2) kristallisiert im Fe2P2S6‐Typ, während Mg2P2Se6 (a = 6, 404(1), c = 20, 194(4)Å) und Zn2P2Se6 (a = 6, 290(3), c = 19, 93(2)Å) den Fe2P2Se6‐Typ (R3; Z = 3) bilden. Ihr Aufbau wird von einer CdCl2‐ bzw. CdI2‐analogen S‐bzw. Se‐Anordnung geprägt, deren Oktaederlücken geordnet zur Hälfte von Mg2+‐ bzw. Zn2+‐Ionen und P2‐Hanteln eingenommen werden. Wird in Mg2P2S6 die Hälfte der Mg2+‐ durch Ag+‐Ionen ersetzt, entsteht mit Ag2MgP2S6 (C2/n; a = 6, 364(1), b = 10, 975(2), c = 13, 999(3)Å, β = 108, 29(3)°; Z = 4) eine Verbindung, bei der die frei gewordenen Oktaeder von Ag+‐Ionen besetzt werden. Diese sind fehlgeordnet, sie befinden sich in zwei Dreieckslücken des Oktaeders bzw. sind etwas aus dieser Position in Richtung der van der Waals Lücken ausgelenkt. Eine analoge Substitution bei Mg2P2Se6 durch K+‐Ionen führt zu K2MgP2Se6 (P21/n; a = 6, 546(1), b = 12, 724(3), c = 7, 599(2)Å, β = 103, 02(3)°; Z = 2) mit einer zu K2FeP2S6 analogen Struktur. Charakteristisches Merkmal sind Ketten von alternierend flächenverknüpften Se‐Oktaedern (Mg‐zentriert) und trigonalen Se‐Antiprismen (P2‐zentriert), die entlang [100] verlaufen und durch K+‐Ionen miteinander verknüpft sind.
Synthese, Kristallstruktur und elektronische Bandstruktur der isotypen Sulfidchloride CuBiSCl2 und AgBiSCl2
Authors: Ruck Michael , Poudeu Poudeu Pierre Ferdinand , Söhnel Tilo 
Published: January 2004

AbstractSchwarze, plättchenförmige Kristalle von MBiSCl2 (M = Cu, Ag)werden durch thermische Umsetzung äquimolarer Gemenge von MCl und BiSCl erhalten. Aus Röntgenbeugungsuntersuchungen an Pulvern und Einkristallen geht hervor, dass die Verbindungen isotyp im Raumgruppentyp Cmcm kristallisieren (M = Cu/Ag: a = 396, 9(1)/397, 1(1); b = 1278, 6(3)/1371, 2(3); c = 859, 7(2)/882, 4(2) pm). In den Kristallstrukturen sind die BiIII‐Kationen in Form zweifach überdachter trigonaler Prismen durch zwei Sulfid‐ und sechs Chlorid‐Ionen koordiniert. Die Polyeder sind über gemeinsame Flächen und Kanten zu [BiS2/2Cl6/3—]‐Schichten verknüpft. Dazwischen finden sich MI‐Kationen, deren verzerrt oktaedrische Koordination sich in zwei kurze, trans‐ständige M—S Bindungen und vier rund 50 pm längere M—Cl Bindungen gliedert. Nach relativistischen Bandstrukturrechnungen (DFT) ist AgBiSCl2 ein indirekter Halbleiter mit einer Bandlücke von etwa 1, 0 eV.
Präparation, Kristallstruktur, Schwingungsspektren und thermische Analyse von Kupfer‐tetrahydrogen‐decaoxo‐diperiodat‐hexahydrat CuH4I2O10·6H2O
Authors: Botova M. , Nagel R. , Haeuseler H. 
Published: January 2004

AbstractKupfer‐tetrahydrogendecaoxodiperiodat‐hexahydrat CuH4I2O10·6H2O wurde durch Kristallisation aus stark saurem Milieu erhalten. In der Struktur der Verbindung ((S.G. P 21/c, Nr.14), Z = 2, a = 1060, 2(2) pm, b = 551, 1(1) pm, c = 1164, 7(2) pm, β = 111, 49(3)°) liegen centrosymmetrische [H4I2O10]2— Anionen in Form kantenverknüpfter Oktaeder vor, die über Wasserstoffbrückenbindungen zwischen den sauren, trans‐ständigen OH‐Gruppen der Anionen zu Schichten verknüpft sind. Die Ramanspektren der Verbindung werden im Bereich der inneren Schwingungen des Periodat‐Anions analysiert. Die Entwässerung von CuH4I2O10·6H2O erfolgt über CuH4I2O10·3H2O zu Cu(H2IO5)2, das sich bei 170 °C zu Cu(IO3)2 zersetzt.
Novel Copper(I)‐Thioantimonates(III): Solvothermal Synthesis, Crystal Structures, Thermal Stability and Magnetic Properties of (C2N2H10)0.5Cu2SbS3, (C3N2H12)0.5Cu2SbS3, and (C4N2H14)0.5Cu2SbS3
Authors: Spetzler Volker , Rijnberk Herme , Näther Christian , Bensch Wolfgang 
Published: January 2004

AbstractThe novel copper(I)‐thioantimonates(III) (enH22+)0.5Cu2SbS3 (I) (en = ethylendiamine), (1, 3‐DAPH22+)0.5Cu2SbS3 (II) (1, 3‐DAP = 1, 3 diaminopropane) and (1, 4‐DABH22+)0.5Cu2SbS3 (III) (1, 4‐DAB = 1, 4‐diaminobutane) were synthesized under solvothermal conditions reacting Sb2S3, CuCl2·2H2O, S with the amines. The compounds crystallize in the monoclinic space group P21/n. The primary building units are a SbS3 trigonal pyramid and two distorted CuS3 units. In the structures the SbS3 pyramid is connected to six CuS3 moieties and every S atom has bonds to one Sb atom and to two Cu atoms. Further interconnection leads to the formation of ten‐membered (10 MR) Cu3Sb2S5 and six‐membered (6 MR) Cu2SbS3 rings. Every 10 MR is condensed to four 10 MR and four 6 MR to form a single layer within the (010) plane. Two such single layers are connected to a double layer thus forming the final [Cu2SbS3]— layered anion. The [CuSbS3]— protonated amines are located between the layers and the interlayer spacing depends on the size and orientation of these amines. Between the Sb atom and one Cu atom a remarkable short distance of about 2.7Å is observed. At elevated temperatures the compounds decompose into CuSbS2 and Cu3SbS4 suggesting a complex redox reaction. Diamagnetic susceptibilities indicate the copper(I) in the metal sulfide frameworks. All three compounds are semiconductors with intermediate band gaps of about 2 eV.
Über Sesquiselenide der Lanthanoide: Einkristalle von Ce2Se3 im C‐, Gd2Se3 im U‐ und Lu2Se3 im Z‐Typ
Authors: Folchnandt Matthias , Schneck Christof , Schleid Thomas 
Published: January 2004

AbstractEinkristalle von Lanthanoid‐Sesquiseleniden (M2Se3; hier: M = Ce, Gd, Lu) gewinnt man bei der Umsetzung der Elemente (Lanthanoid und Selen) im molaren Verhältnis von 2:3 innerhalb von sieben Tagen bei 850 °C in evakuierten Quarzglasampullen, wenn äquimolare Mengen an NaCl als Flußmittel zugegen sind. Im Falle von Ce2Se3 (a = 897, 74(6) pm) und Gd2Se3 (a = 872, 56(5) pm) entsteht der kubische C‐Typ (I4¯3d, Z = 5, 333) in Form von dunkelroten Perlen, für Lu2Se3 (a = 1125, 1(1); b = 798, 06(8); c = 2387, 7(2) pm) der orthorhombische Z‐Typ (Fddd, Z = 16) als orangegelbe Quader. Bei der Oxidation von Monochlorid‐Hydriden (MClHx bzw. AyMClHx; M = Ce, Gd, Lu; x = 1; A = Li, Na; y = 0, 5) mit Selen werden aus verschweißten Tantal‐Ampullen mit C‐Ce2Se3 und Z‐Lu2Se3 die gleichen Hauptprodukte erhalten, selbst wenn Überschüsse an NaCl bzw. LiCl als Flußmittel zum Einsatz kommen. Im Falle von Gd2Se3 bilden sich dagegen schwarzrote Nadeln vom orthorhombischen U‐Typ (Pnma, Z = 4; a = 1118, 2(1); b = 403, 48(4); c = 1097, 1(1) pm) an Stelle von C‐Gd2Se3. C‐Ce2Se3 kristallisiert gemäß Ce2, 667□0, 333Se4 mit Z = 4 in einer kationendefekten Th3P4‐Struktur (Ce2S3‐Typ) mit Z = 5, 333 für die Formel Ce2Se3. Ce3+ ist hier von acht Se2—‐Anionen trigondodekaedrisch koordiniert. In U‐Gd2Se3 (U2S3‐Typ) liegen zwei kristallographisch unterschiedliche Gd3+‐Kationen mit Koordinationszahlen von 7 (Gd1) bzw. 7+1 (Gd2) und ein‐ bzw. zweifach überkappten trigonalen Prismen als Koordinationspolyedern vor. Auch Z‐Lu2Se3 (Sc2S3‐Typ) weist zwei verschiedene Lu3+‐Kationen auf, die sich jedoch beide in oktaedrischer Sechser‐Koordination der Se2—‐Anionen befinden.
Chemical Bonding and Pressure‐Induced Change of the Electron Configuration of Ytterbium in β‐YbAgGa2
Authors: Schwarz Ulrich , Schmidt Marcus , Gumeniuk Roman , Schnelle Walter , Hanfland Michael , Klementiev Konstantin , Grin Yuri 
Published: January 2004

AbstractSingle‐phase polycrystalline samples of the intermetallic compound β‐YbAgGa2 were synthesized by inductive heating and subsequent annealing for eight weeks at 670 K. Magnetic properties were characterized by susceptibility measurements and indicated intermediate valence of ytterbium at ambient pressure. Angle‐dispersive X‐ray powder diffraction data of orthorhombic β‐YbAgGa2 indicate stability of the phase in the investigated pressure range from 0.1 MPa (ambient pressure) to 19 GPa. The pressure‐induced volume decrease is accompanied by an increase of the effective valence from 2.17 at ambient conditions to 2.71 at 16 GPa as evaluated by X‐ray absorption spectroscopy at the Yb LIII threshold. Analysis of the chemical bonding in β‐YbAgGa2 by integrating the electron density of the polyanion in basins as defined by the electron localization function results in an electron count Yb2.7+[(Ag0.2—)(Ga1(3b)1.0—)(Ga2(4b)1.5—)]. This finding is close to the expected values calculated by means of the Zintl rules and fits well the results of magnetic susceptibility measurements and XAS investigations.