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HALLOYSITE [18 records]

Record 1 2015-04-15

English

Subject field(s)
  • Mineralogy
DEF

A clay near halloysite...

French

Domaine(s)
  • Minéralogie
DEF

Variété d'halloysite.

Spanish

Save record 1

Record 2 2013-07-30

English

Subject field(s)
  • Mineralogy
DEF

A clay mineral intermediate to kaolinite and halloysite...

French

Domaine(s)
  • Minéralogie

Spanish

Save record 2

Record 3 2013-05-28

English

Subject field(s)
  • Mineralogy
DEF

A mineral consisting of a partially dehydrated halloysite.

French

Domaine(s)
  • Minéralogie
DEF

Halloysite qui, partiellement déshydratée [...] acquiert ainsi la formule chimique de kaolinite, mais dont le système cristallin est différent.

Spanish

Save record 3

Record 4 2012-05-01

English

Subject field(s)
  • Mineralogy
DEF

A clay-like substance resembling halloysite, of uncertain composition, from the antimony mines of Meyssonial en Mercoeur in Haute-Loire, France.

French

Domaine(s)
  • Minéralogie
DEF

Mélange de montmorillonite, de kaolinite et de silice colloïdale.

DEF

Variété opalifère de montmorillonite.

Spanish

Save record 4

Record 5 2012-04-20

English

Subject field(s)
  • Mineralogy
DEF

A whitish, yellowish, greenish or bluish coloured [mineral], resembling opal and allophane.

OBS

A mixture of diaspore, halloysite [and] variscite.

OBS

Material described by [Anton] Schrötter as opaline allophane from the vicinity of Freienstein, Styria, in 1837, was named “schrötterite” by [E. F.] Glocker in 1839.

Key term(s)
  • opalin-allophan
  • schrotterite

French

Domaine(s)
  • Minéralogie
DEF

Substance minérale appartenant au genre argile, variété d'allophane.

OBS

Mélange d'halloysite et de variscite (phosphate d'alumine). Décrit par Schrötter en 1837.

Spanish

Save record 5

Record 6 2012-04-19

English

Subject field(s)
  • Mineralogy
Universal entry(ies)
Al2Si2O5(OH)4
formula, see observation
DEF

A clay mineral of the kaolinite-serpentinite group with three polymorphs, halloysite, kaolinite and nacrite.

CONT

Prior to dickite being established as a new mineral species by Ross and Kerr (1930) there was considerable confusion in the literature with kaolinite, nacrite and dickite all described under the name kaolinite. ... The type locality for dickite is Pant-y-Gaseg Mine, Trwyn-Bychan, Anglesey. This mineral is most commonly found in hydrothermal vein deposits and as an authigenic mineral (a mineral which has grown after the sediment was deposited) in sedimentary rocks.

OBS

Dickite is named after Allan B. Dick, who provided a detailed description of this mineral from Trwyn-Bychan in northern Anglesey (Dick 1888, 1908).

OBS

Chemical formula: Al2Si2O5(OH)4

French

Domaine(s)
  • Minéralogie
Entrée(s) universelle(s)
Al2Si2O5(OH)4
formula, see observation
DEF

Minéral (silicate d'aluminium hydraté) du système cristallin monoclinique [ayant] la même composition chimique que la kaolinite, l'halloysite et la nacrite, avec lesquelles elle est groupée et desquelles elle diffère par des détails au niveau de la structure atomique ainsi que par certaines propriétés physiques.

OBS

Formule chimique : Al2Si2O5(OH)4

Spanish

Campo(s) temático(s)
  • Mineralogía
Entrada(s) universal(es)
Al2Si2O5(OH)4
formula, see observation
DEF

Silicato de aluminio hidratado perteneciente al grupo de la caolinita.

OBS

Fórmula química: Al2Si2O5(OH)4

Save record 6

Record 7 2012-04-19

English

Subject field(s)
  • Mineralogy
DEF

A clay mineral close to halloysite.

OBS

Sedletzky and Yusupova in 1940 described a mineral from Jurassic beds of Tashkent, U. S. S. R., as "ablykite". The material was said to resemble halloysite in its dehydration characteristics but to differ from it in its x-ray-diffraction properties.

Key term(s)
  • ablikite

French

Domaine(s)
  • Minéralogie
OBS

L'ablykite est un minéral argileux voisin de l'halloysite, décrit par I. Sedletzky et S. Yusupova.

Spanish

Save record 7

Record 8 2011-06-20

English

Subject field(s)
  • Mineralogy
Universal entry(ies)
Al2Si2O5(OH)4
formula, see observation
DEF

A claylike aluminum silicate ... resembling kaolinite but amorphous, and containing more water.

OBS

Chemical formula: Al2Si2O5(OH)4

French

Domaine(s)
  • Minéralogie
Entrée(s) universelle(s)
Al2Si2O5(OH)4
formula, see observation
DEF

Minéral colloïdal voisin du kaolin, constitué de silicate d'aluminium amorphe.

CONT

L'halloysite est un minéral argileux de même structure que la kaolinite mais les feuillets sont séparés par une couche de molécules d'eau [...]

OBS

Formule chimique : Al2Si2O5(OH)4

Spanish

Campo(s) temático(s)
  • Mineralogía
Entrada(s) universal(es)
Al2Si2O5(OH)4
formula, see observation
DEF

Aluminosilicato hidratado [...], que cristaliza en el sistema monoclínico; es un mineral arcilloso, un caolín hidratado, de color generalmente opalino y de fractura concoidea [...]

OBS

Fórmula química: Al2Si2O5(OH)4

Save record 8

Record 9 2011-06-16

English

Subject field(s)
  • Mineralogy
DEF

A variety of halloysite containing iron.

CONT

A number of iron-rich halloysites from Russia and one from Italy have been described. Such clays have been called ferrihalloysite by Vakhrushev and Baxpymeb (1949). ... The iron in the Russian clays is largely ferric ...

French

Domaine(s)
  • Minéralogie
DEF

Variété ferrifère d'halloysite.

Spanish

Save record 9

Record 10 2011-06-15

English

Subject field(s)
  • Mineralogy
DEF

A variety of halloysite from Angleur, Belgium.

French

Domaine(s)
  • Minéralogie
DEF

Variété d'halloysite.

Spanish

Campo(s) temático(s)
  • Mineralogía
DEF

Variedad de haloisita.

Save record 10

Record 11 2010-10-07

English

Subject field(s)
  • Mineralogy
DEF

Clays of the allophane, halloysite and montmorillonite groups.

Key term(s)
  • allophanoid

French

Domaine(s)
  • Minéralogie
OBS

Terme général pour désigner l'allophane, la montmorillonite et l'halloysite.

Key term(s)
  • allophanoïde

Spanish

Save record 11

Record 12 2007-11-14

English

Subject field(s)
  • Erosion and Weathering (Geol.)
  • Geochemistry
  • Petrography
CONT

Mineralogy and geology of the Maungaparerua halloysite deposit in New Zealand.... The halloysite deposit was formed by hydrothermal alteration of rhyolite flow rocks. Superimposed on the hydrothermally altered halloysite is deep intensive surficial weathering resulting from the humid climate on the extreme tip of the North Island. The deposit has been drilled and the cores have been analyzed mineralogically and chemically. Drilling has shown that the... altered rocks contain about 50% quartz and fine amorphous silica and 50% of a mix of halloysite, kaolinite, and allophane with a small amount of plagioclase feldspar in the coarse fraction. The upper 8-30 m, with an average of 15 m, of the halloysite alteration deposit consists of relatively soft clay.

CONT

Stratigraphy and petrology of hydrothermal alteration deposits related to Strombolian versus Surtseyan activity in Llancanelo Volcanic Field, Mendoza-Argentina.

CONT

Magnesite (magnesium carbonate - MgCO3) occurs as bedded sedimentary deposits, replacement deposits or alteration deposits with minor amounts of limestone, silica and iron.

PHR

Hydrothermal, tectonic alteration deposit.

French

Domaine(s)
  • Érosion et corrosion (Géologie)
  • Géochimie
  • Pétrographie
DEF

Accumulation de sédiments anguleux, de dimensions variées, qui se détachent de la roche à cause de phénomènes mécaniques (désagrégation) et chimiques (dissolution).

CONT

Les substrats sur lesquels seront érigées les éoliennes sont essentiellement des dépôts d'altération, provenant de la désagrégation ou de la décomposition du substrat rocheux en place, ainsi que de dépôts qui ont été en partie remaniés par les eaux de surface et la gravité (colluvions) [...]

CONT

Les sapinières occupent surtout des versants en pente forte recouverts de dépôts d'altération (altérites) ou d'accumulation de sédiments (colluvions).

OBS

Les sédiments sont généralement fins s'ils proviennent de roches sédimentaires et plus grossiers s'ils sont issus de roches cristallines.

Spanish

Save record 12

Record 13 2005-07-05

English

Subject field(s)
  • Mineralogy
OBS

A variety of the mineral halloysite.

French

Domaine(s)
  • Minéralogie
OBS

Variété blanche et fragile d'halloysite.

Spanish

Campo(s) temático(s)
  • Mineralogía
OBS

Variedad de halloysita.

Save record 13

Record 14 2005-07-04

English

Subject field(s)
  • Geology
  • Soil Science
OBS

A term that was originally applied to fuller's earth and later to the mineral montmorillonite, and that has also been applied to certain clay deposits that are apparently bentonite and to a greenish variety of halloysite...

French

Domaine(s)
  • Géologie
  • Science du sol
CONT

Les minéraux argileux. [...] On en connaît plusieurs groupes [...] : [...] minéraux à trois feuillets : smectites et illites [...]. [...] Les smectites, dont les plus répandues sont les montmorillonites, sont des phyllites à trois couches, [...] sont des minéraux expansibles [...]

OBS

Absorbante, la smectite est utilisée pour le dégraissage des peaux sous le nom de terre à foulon.

Spanish

Campo(s) temático(s)
  • Geología
  • Ciencia del suelo
OBS

Variedad de arcilla detergente que se usaba para desengrasar la lana.

Save record 14

Record 15 2005-03-08

English

Subject field(s)
  • Geochemistry
  • Erosion and Weathering (Geol.)
DEF

The rock or mineral formed as a result of alteration; often referred to as secondary.

CONT

Pyrite is present in some cases but appears to be either vein-related or a supergene alteration product after pyrrhotite.

CONT

Locally the veins contain coffinite, uranoan carbon (thucholite) and secondary uranium minerals, such as metauranocircite, liebigite and becquerelite. The secondary uranium minerals are alteration products after pitchblende.

CONT

Associated alteration products include clay(kaolinite and halloysite), sericite, pyrite, and fluorite...

French

Domaine(s)
  • Géochimie
  • Érosion et corrosion (Géologie)
CONT

La magnésite est un produit d'altération des serpentines [...]

CONT

[...] la décomposition des feldspaths amène la formation de très nombreux produits d'altération : silicates (amphiboles et hydromicas, grenats, épidote, zoïsite, dipyre, argiles diverses), carbonates [...], oxydes de fer, de titane [...]

CONT

Les processus physiques, chimiques et biologiques qui conduisent de la roche saine à ses produits de décomposition sont appelés altération.

CONT

[...] les feldspaths et les biotites [...] constituent à la surface de la terre la plus grosse masse de minéraux altérés, soit en place, soit après sédimentation de leurs produits d'altération.

Spanish

Save record 15

Record 16 1999-03-09

English

Subject field(s)
  • Mineralogy
DEF

An impure variety of halloysite, dark green in color.

French

Domaine(s)
  • Minéralogie
DEF

Halloysite impure.

Spanish

Save record 16

Record 17 1999-03-05

English

Subject field(s)
  • Mineralogy
DEF

A hypothetic molecule... containing the same number of atoms as halloysite..., the two being regarded as end members of the pilolite-palygorskite group.

French

Domaine(s)
  • Minéralogie
DEF

Molécule hypothétique, terme magnésien du groupe pilolite-palygorskite.

Spanish

Save record 17

Record 18 1977-12-14

English

Subject field(s)
  • Mineralogy
OBS

A name used in U. S. for a clay mineral :(...). It is the more hydrous form of halloysite(...)

OBS

A mineral,(...) having a structure in which kaolinite-type layers alternate with single layers of water molecules; related to halloysite.

French

Domaine(s)
  • Minéralogie
OBS

Halloysite hydratée.

Spanish

Save record 18

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