Calculation of chemical bond parameters in RBa2Cu4O8(R = Dy,Ho,Er,Tm,Yb) and Y2Ba4Cu7O14.3

Chemical bond parameters in RBa2Cu4O8(R = Dy, Ho, Er, Tm, Yb) and Y2Ba4Cu7O14.3 were calculated by using complex chemical bond theory. The results indicated that the bond covalency in CuO chain was larger than that in CuO2 plane. For metal atoms, the bond covalency of five coordinated case was larger than that of six coordinated case.

RBa_2Cu_4O_8(R=Dy,Ho,Er,Tm,Yb)和Y_2Ba_4Cu_7O_(14.3)的化学键参数计算

使用复杂晶体上化学键理论计算了 RBa2 Cu4 O8(R=Dy,Ho,Er,Tm ,Yb)和 Y2 Ba4 Cu7O14 .3 的化学键参数 .结果表明 ,Cu O链上的 Cu O键共价性大于它们在 Cu O2 面的共价性 .当金属元素与氧形成五配位时 ,其共价性的数值大于这些元素在六配位时的情形

Bond covalencies in R2BaCuO5 (R = Sm, Gd, Dy, Ho, Y, Er, Tm, Yb, Lu)

Bond covalencies in R2BaCuO5 (R = Sm, Gd, Dy, Ho, Y, Er, Tm, Yb, Lu) were calculated by means of a semiempirical method. This method is the generalization of the dielectric description theory of Phillips-Van Vechten-Levine-Tanaka scheme. The present paper presents the formula concerning the decomposing of complex crystals which are usually anisotropic systems into the sum of binary crystals which are isotropic systems. It can be seen that although the bond covalency is related to many physical quantities, it is mainly influenced by bond valence or bond charge, and a higher bond valence will produce higher bond covalency.

The bond ionicity in RBa2Cu3O7 (R=Pr, Sm, Eu, Gd, Dy, Y, Ho, Er, Tm)

RBa2Cu3O7 (R = Pr, Sm, Eu, Gd, Dy, Y, Ho, Er, Tm) has been studied using complex chemical bond theory. The results indicated that with the decreasing of R radius, the ionicities for all considered types of bond decrease. This is in good agreement with the experimental fact that T-c decreases with the decreasing of R radius. PrBa2Cu3O7 with no Ba-site Pr in this calculation is also predicted to be a superconductor. This supports the conclusion obtained by Blackstead et al. The ionicity for each bond obeys the following order: Ba-O > R-O > Cu(2)-O(1) > Cu(2)-O(2,3) > Cu(1)-O(4) similar to Cu(1)-O(1).

Evoluci??n en el dise??o y funcionalidad de las r??bricas: desde las r??bricas ???cuadradas??? a las er??bricas federadas

Resumen basado en el de la publicaci??n

Magnetic structures of quaternary intermetallic borocarbides RCo(2)B(2)C (R = Dy, Ho, Er)

The magnetic structures of the title compounds have been studied by neutron diffraction. In contrast to the isomorphous RNi(2)B(2)C compounds, wherein a variety of exotic incommensurate modulated structures has been observed, the magnetic structure of ErCo(2)B(2)C is found to be a collinear antiferromagnet with k = (12, 0, 12) while those of HoCo(2)B(2)C and DyCo(2)B(2)C are observed to be simple ferromagnets. For all studied compounds, the moments are found to be confined within the basal plane and their magnitudes are comparable to the values obtained from the low-temperature isothermal magnetization measurements. The absence of modulated magnetic structures in the RCo(2)B(2)C series (for ErCo(2)B(2)C, verified down to 50 mK) is attributed to the quenching of the Fermi surface nesting features.

Megaleh nistarot : Enthüller literärischer Geheimnisse eines unvergleichlichen Literaten ; eine außergewöhnliche Rezension über e. in Sárospatak 1868 u. d. Namen "Mikroé-Kodesch" ersch., angeblich von Is. R-er. ... verf. "Biblische Geschichte"

von Israel Singer. Mit e. Beitr. von Ignatz Führer

Ferṭer band (R - T)

Digitalisat der Ausg. Ṿilne, 1929

Ein maiśe fun kinig Arṭiś hof : wi er zich in zainm kinigraich hoṭ ṭun firn un waz er hoṭ gehoṭ fer monir un fun dem brimṭn riṭr Widwilṭ ...

Digitalisat der Ausg. Fjurda, 1780/81

Tôrat lāšôn ʿivrît qeṣārā ... oder kurtzgefasṭe und deiṭliche ebreiše šprachlehre tzum gebroich jidiš-daiṭšer šulen

mē'ēt Šālôm Ben-Yaʿaqōv Kôhēn

Erśṭr brif : tzur ibung der jugnd in šraibn und ridn ...

Digitalisat der Ausg. Oivibach, 1779/80

Ṭoizind und ein nachṭ : arabiši ertzehlung ; erśṭr und tzweiṭr ṭeil ; ... ois den (arabišen) in (frantzezišen) ... in (holendišen) ... oif ṭaiṭš und fun den hoich ṭaiṭš in (jehudis-ṭaiṭš) iberzetzṭ ...

Digitalisat der Ausg. Frankfurt an der Oder, 1802/03

Sēfer Takšîtê nāšîm : senîf min-has-sēfer mûsār alef-vêt le-vānîm ; ḥeṣî mi-ḥelqat revîʿît ham-meyûḥedet le-vānôt ... (bi-lešôn aškenaz) be-loišn jidiš-daiṭš ... fir alle jidiše ṭechṭer ...

... Dawid Špiṭtzer

Tôrat lāšôn ʿivrît qeṣārā : ebreiše sprachlehre tzum gebroich jidiš-daiṭšer šulen

mē'ēt Šālôm Ben-Y. Kōhēn. Zehr fermehrṭ und ferbeserṭ fon Wolf Maier

Sēfer Ṣawwā'at û-mîtat hā-rav ... Naftālî hak-kōhēn : in dizn (sēfer) werṭ bešribn wi dr geṭlichi mon (hā-rav ... Naftālî hak-kōhēn ...) izṭ ibr gfohrn noch (Ereṣ Yiśrā'ēl) un wi er gišṭorbn izṭ ...

Digitalisat der Ausg. Franckfurt an der Oder, [1802/03]