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Hollandites
钡硬锰矿百度百科
亮灰色，灰黑色至黑色。条痕黑色。半金属光泽至金属光泽。解理{100}，晶体较大时还可见{001}解理。由于解理磨光时（110）易于破碎。磨光性较其他面差。断口参差状。硬度6性脆。比重495。矿相显微镜下白带浅黄色。反射率R=225（红光），225（橙光），285（绿光）。反射多色性显著。 展开2020年3月25日 This review provides a broad overview of the structural characteristics, compositional flexibility, and structure–property relationships of hollandite materials Hollandites’ crystal chemistry, properties, and processing: a
Hollandites’ crystal chemistry, properties, and
2020年3月25日 This review provides a broad overview of the structural characteristics, compositional flexibility, and structure–property 2014年8月27日 Abstract Discovery of new complex oxides that exhibit both magnetic and ferroelectric properties is of great interest for the design of functional magnetoelectrics, in Hollandites as a new class of multiferroics Scientific Reports
ACS Publications
2023年9月20日 ABSTRACT This review provides a broad overview of the structural characteristics, compositional flexibility, and structure–property relationships of hollandite materials Hollandites have a Hollandites’ crystal chemistry, properties, and
Electronic characterization of alkali ruthenium hollandites:
2004年9月1日 The hollandite ruthenates should also allow for variation of properties within a single structural family Hollandites (Fig 1), with the general formula A x BO 2, usually yield ordered stoichiometric compounds at x = 1/4 or 1/6, resulting in formulas AB 4 O 8 or AB 6 O 12, often with tetragonal symmetry [8]Structurally, they consist of one Post J E, Von Dreele R B, Buseck P R (1982) Symmetry and cation displacements in hollandites: structure refinements of hollandite, cryptomelane and priderite Acta Crystallographica B38 10561065: 1982: Stuor Njuoskes, Sweden: 0: 293: : Hollandite: Miura H (1986) The crystal structure of hollandite Mineralogical Journal 13 Hollandite: Mineral information, data and localities
Asite compositional effects in Gadoped hollandite
2016年6月7日 Hollandites are actually a subset of minerals in the priderite group, (K,Ba)(Ti,Fe) 8 O 16, in which the majority of the Msite is replaced with Ti2018年2月1日 Here, we present the structural analysis of phasepure hollandites of the system Ba 115x Cs 2x Cr 23 Ti 57 O 16 The structural characteristics of the host lattice Ba 115 Cr 23 Ti 57 O 16 are discussed and, the effects of Cs substitution on the octahedral framework and the order/disorder of the tunnel cations are reviewed 2Cesium immobilization in (Ba,Cr)hollandites: Effects on
Electronic characterization of alkali ruthenium hollandites: KRu
Transport, specific heat, and magnetic measurements have been performed on three alkali hollandites: KRu 4 O 8, RbRu 4 O 8, and a newly synthesized Cs analog, Cs 08 Li 02 Ru 4 O 8, which was determined to have space group I4/m (#87) and lattice parameters, a = 100850(4) and c = 312180(20)In contrast to the ruthenium perovskites, which display a New insights into the chemical and structural features of iron or titaniumdoped K x MnO 2 hollandites are reported Neutron diffraction and atomically resolved transmission electron microscopy elucidate the localization of the dopant cations that could be one of the key factors governing the functional activity of these nanomaterialsUnambiguous localization of titanium and iron cations in
Hollandites’ crystal chemistry, properties, and processing: a
2020年3月25日 This review provides a broad overview of the structural characteristics, compositional flexibility, and structure–property relationships of hollandite materials Hollandites have a general formula AxB8O16, x ≤ 2, with ‘A’ cations located in onedimensional tunnels formed by a framework of ‘B’–O octahedra With numerous 1978年4月1日 Abstract Three kinds of hollandite, K x Zn x/2 Ti 8−x/2 O 16 and K x Fe x Ti 8−x, were sintered at 1200°C for 5 h and the single phases were found in the composition range of 16 ≦ x ≦ 20 by Xray diffraction The measured impedances were plotted against three kinds of variable and the samples were electrolysed to make clear the Ionic conductivities of hollandites ScienceDirect
Synthesis and Study of Phases with a HollanditeType
2022年7月18日 Abstract Ceramics based on hollandites are known to mainly produced by the conventional solidphase method However, the use of various sol–gel methods in some cases makes it possible to change the temperature and time its synthesis, morphological characteristics, porosity, and electrophysical properties In this work, ceramic materials 1987年4月1日 Hollandites may be characterized as oxides of composition AxM(IV)4yNyO8 (5) The M and N ions are octahedrally coordinated The structure conslsts of cornersharing double chains of edgesharing octahedra, thus forming square tunnels, which are occupied by large A ions The difference between the charges of M and N Composition, constitution and stability of the synthetic hollandites
Synthesis and characterization of the pseudohexagonal hollandites
2006年3月1日 The crystal structures, synthesis and physical properties of ruthenium hollandites ALi 2 Ru 6 O 12 (A=Na, K) with a new pseudohexagonal structure type are described Analogous to tetragonal hollandites, the framework is made of MO 6 octahedra in double chains that share corner oxygens with each other to create interstitial tunnels 2017年9月23日 [ トップ] [ English] Hollandites japonicus Hollandites japonicus (Mojsisovics) ホランジテス ジャポニクス 絶滅種 環境: 海 分類 動物界, 軟体動物門, 頭足網, アンモナイト亜網, アンモナイト目, ベイリチテス科 ホランジテス属 分布 三畳紀: 宮城 下位 Hollandites japonicus TrekGEO
(Na,K) Aluminosilicate Hollandites: Structures, Crystal
2007年1月1日 The variation with pressure of the symmetry breaking strains is similar in K08Na02AlSi3O8 and KAlSi3O8 hollandites, suggesting that Na substitution mainly affects the transition pressure but not 2020年3月25日 Hollandites 的晶体化学、特性和加工：综述,International Materials Reviews XMOL 当前位置： XMOL 学术 › Int Mater Rev › 论文详情 Our official English website, xmol, welcomes your feedback! (Note: you Hollandites 的晶体化学、特性和加工：综述,International
ACS Publications
2023年9月20日 ABSTRACT This review provides a broad overview of the structural characteristics, compositional flexibility, and structure–property relationships of hollandite materials Hollandites have a Hollandites’ crystal chemistry, properties, and
Electronic characterization of alkali ruthenium hollandites:
2004年9月1日 The hollandite ruthenates should also allow for variation of properties within a single structural family Hollandites (Fig 1), with the general formula A x BO 2, usually yield ordered stoichiometric compounds at x = 1/4 or 1/6, resulting in formulas AB 4 O 8 or AB 6 O 12, often with tetragonal symmetry [8]Structurally, they consist of one In 2012, the IMA revised the nomenclature of the Hollandite Supergroup (Biagioni et al, 2013) Hollandite is now redefined as the (more widespread) BaMn 3+ endmember of the coronadite group; concurrently, type hollandite is redefined as ferrihollandite, a new name to denote the BaFe 3+ endmember (Biagioni et al, 2013) The original type locality for Hollandite: Mineral information, data and localities
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