rhom·bo·he·dral

(rŏm′bō-hē′drəl)

adj.

1. Of or relating to a rhombohedron.

2. Mineralogy Of or relating to a crystal having three axes of equal length intersecting at oblique angles.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

rhombohedral

(ˌrɒmbəʊˈhiːdrəl)

adj

1. (Mathematics) of or relating to a rhombohedron

2. (Chemistry) crystallog another term for trigonal²

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

rhom·bo·he·dral

(rŏm′bō-hē′drəl)

See trigonal.

The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

ThesaurusAntonymsRelated WordsSynonymsLegend:

Adj.

rhombohedral - having threefold symmetry

trigonal

crystallography - the branch of science that studies the formation and structure of crystals

symmetric, symmetrical - having similarity in size, shape, and relative position of corresponding parts

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References in periodicals archive

It appears that negatively charged block of the copolymer binds only to the edges and vertices of the rhombohedral calcite crystal and other water soluble block sterically inhibits the introduction of the ions into the vertices and edges of the crystal structure at higher pHs.

Biomimetic Crystallization of Calcium Carbonate in the Presence of Water-Soluble Zwitterionic Block Copolymer

Calcite occurs as micrite, sparite and signifies rhombohedral cleavage occasionally.

MICROFACIES ANALYSIS AND DEPOSITIONAL SETTING OF LOCKHART LIMESTONE MANHIALA AREA, EASTERN SALT RANGE, PAKISTAN

[18] prepared La doped BFO by sol-foam-gel method and observed that La doping results change in crystallographic structure of BFO from rhombohedral to Tetragonal.

Effect of Heat Treatment and La Doping on the Electrical Properties of BiFeO3

In Figure 3 is shown the X-ray diffraction patterns for all of the hydrotalcite samples, where it is possible to observe the R-3m rhombohedral phase as a single phase in the precipitate samples, despite of the iron insertion, according the card number 89-5434 of the JCPDS data bank for powder diffraction patterns.

Synthesis of Lamellar Structures of Magnesium (II), Aluminum (III) and Iron (III) Hydroxides Interchanged with Carbonate Ion through Precipitation in pH 11

To study the kinetics of hydrogen adsorption and desorption in such structures, three sets of the nc-SiC films containing mixtures of cubic and rhombohedral phases (3C + 21 R polytypic) were deposited on the single-crystalline Cu substrates.

Layers of Nanocrystalline SiC as a New Type of Solid-State Hydrogen Storage

Impurity fringes are commonly observed along chalk fragments in the hydraulic breccia and also contain rhombohedral dolomite crystal ghosts (Figures 3(b) and 3(c)).

Understanding Fluid Flow during Tectonic Reactivation: An Example from the Flamborough Head Chalk Outcrop (UK)

A morphotropic region exists on the T-x phase diagram around x [approximately equal to] 0.35 wherein several phases can come about: the cubic, pseudo-cubic, tetragonal, and rhombohedral [9].

Behaviour of thermal expansion of (1-x)Pb([Ni.sub.1/3]][Nb.sub.2/3]])[O.sub.3]]--xPbTi[O.sub.3]] solid solutions

This correlated with the report of [16], where in rhombohedral (trigonal) structure was exhibited by the calcium carbonate obtained from the sample.

Quality (nanoscale) assessments of calcium carbonate present in shells of Anadara granosa, and Crassostreao virginica marine species located in the coastal part of South India

In addition, its binding energy on (104) was much less than the attachment energy of (104), which was also in accordance with the experimental observation of PEI not affecting the general rhombohedral morphology of calcite [11].

Molecular Dynamics Simulation to Understand the Ability of Anionic Polymers to Alter the Morphology of Calcite

These are composed of dolomite crystals (0.1-0.3 mm), which usually have rhombohedral shape and calcite.

Lower Devonian lithofacies and palaeoenvironments in the southwestern margin of the East European Platform (Ukraine, Moldova and Romania)/Alam-Devoni litofaatsiesed ja paleokeskkond Ida-Euroopa platvormi edelapiiril (Ukrainas, Moldovas ja Rumeenias)