Global Information Lookup Global Information

Hydrotalcite information


Hydrotalcite
Hydrotalcite with serpentine, Snarum, Modum, Buskerud, Norway. Size: 8.4 × 5.2 × 4.1 cm
General
CategoryCarbonate mineral
Formula
(repeating unit)		Mg6Al2CO3(OH)16·4H2O
IMA symbolHtc[1]
Strunz classification5.DA.50
Crystal system3R polytype: Trigonal
2H polytype: Hexagonal
Crystal class3R polytype: Hexagonal scalenohedral (3m)
H-M symbol: (3 2/m)
2H polytype: Dihexagonal dipyramidal (6/mmm)
Space groupR3m
Unit cella = 3.065 Å,
c = 23.07 Å; Z = 3
Identification
ColorWhite with possible brownish tint
Crystal habitSubhedral platey crystals, lamellar-fibrous, rarely euhedral prismatic; commonly foliated, massive
Cleavage{0001}, perfect
TenacityFlexible, not elastic
Mohs scale hardness2
LusterSatiny to greasy or waxy
StreakWhite
DiaphaneityTransparent
Specific gravity2.03–2.09
Optical propertiesUniaxial (−)
Refractive indexnω = 1.511 – 1.531 nε = 1.495 – 1.529
Birefringenceδ = 0.016
Other characteristicsGreasy feel
References[2][3][4][5]

Hydrotalcite, or formerly also völknerite,[6] is a layered double hydroxide (LDH) of general formula Mg
6Al
2CO
3(OH)
16·4H
2O, whose name is derived from its resemblance with talc and its high water content. Multiple structures containing loosely bound carbonate ions exist. The easily exchanged carbonates allow for applications of the mineral in wastewater treatment and nuclear fuel reprocessing.

  1. ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
  2. ^ Mindat.org
  3. ^ Handbook of Mineralogy
  4. ^ Webmineral data
  5. ^ "IMA Nomenclature Report" (PDF). Archived from the original (PDF) on 2013-05-24. Retrieved 2012-11-25.
  6. ^ Rammelsberg, C. (1856-05-01). "On völknerite or hydrotalkite, and the so-called steatite of Snarum". The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science. 11 (73): 405–407. doi:10.1080/14786445608642090. ISSN 1941-5982.

and 23 Related for: Hydrotalcite information

Request time (Page generated in 0.5739 seconds.)

Hydrotalcite

Last Update:

Hydrotalcite, or formerly also völknerite, is a layered double hydroxide (LDH) of general formula Mg 6Al 2CO 3(OH) 16·4H 2O, whose name is derived from...

Word Count : 865

Layered double hydroxides

Last Update:

of LDH are classified as members of the hydrotalcite supergroup, named after the Mg-Al carbonate hydrotalcite, which is the longest-known example of a...

Word Count : 1576

Antacid

Last Update:

two salts, such as magnesium carbonate and aluminum hydroxide (e.g., hydrotalcite). Antacids are available over the counter and are taken by mouth to quickly...

Word Count : 1639

Nitrile rubber

Last Update:

nitrile rubber (XNBR) and magnesium aluminum layered double hydroxide (Hydrotalcite)". Express Polymer Letters. 8 (6): 374–386. doi:10.3144/expresspolymlett...

Word Count : 1506

Carbonate mineral

Last Update:

Zaccagnaite, 45 Manasseite, 45 Sjogrenite; 50 Desautelsite, 50 Comblainite, 50 Hydrotalcite, 50 Pyroaurite, 50 Reevesite, 50 Stichtite, 50 Takovite; 55 Coalingite...

Word Count : 1159

Magnesium hydroxide

Last Update:

constitutes the main basis of layered double hydroxide (LDH). LDH minerals as hydrotalcite are powerful anion sorbents but are relatively rare in nature. Brucite...

Word Count : 1759

Gleysol

Last Update:

rust; ordering, deprotonation and/or cation substitution; structure of hydrotalcite-like compounds and mythic ferrosic hydroxide Fe(OH)2+x. Solid State Sciences...

Word Count : 818

List of minerals

Last Update:

Hydrogrossular (series of garnets) Hydrohalite Hydrokenoelsmoreite Hydromagnesite Hydrotalcite Hydroxylapatite Hydrozincite Varieties that are not valid species: Hatchettite...

Word Count : 2732

Aluminium carbonate

Last Update:

both aluminium and carbonate. Dawsonite has the formula NaAlCO3(OH)2. Hydrotalcites, both synthetic and natural, are layered metal hydroxides comprised...

Word Count : 505

Schedule H

Last Update:

HEPATITIS B. VACCINE 240. HYALURONIDASE 241. HYDROCORISONE 17-BUTYRATE 242. HYDROTALCITE 243. HYDROXIZINE 244. IBUPROFEN 245. IDEBENONE 246. IINDAPAMIDE 247....

Word Count : 253

List of mineral symbols

Last Update:

Hashemite Hsh Henmilite Hen Hingganite-(Y) Hin-Y Huanghoite-(Ce) Hho-Ce Hydrotalcite Htc Hastingsite Hst Hennomartinite Hma Hingganite-(Yb) Hin-Yb Huangite...

Word Count : 401

Simeticone

Last Update:

Dom Simecon, Doprokin-S, Glomoti, Moperidona AF, Mutecium, Praxis with hydrotalcite as Altacide and Talsil Forte with homatropine as Aero-Sim Compuesto,...

Word Count : 694

Kovdorskite

Last Update:

Peninsula, Russia. It is associated with collinsite, magnesite, dolomite, hydrotalcite, apatite, magnetite, and forsterite. Warr, L.N. (2021). "IMA–CNMNC approved...

Word Count : 229

Calcium silicate hydrate

Last Update:

hydrate, (C-A-S-H) minerals: Hydrogarnet – Calcium aluminium garnet Hydrotalcite – Hydrated Mg-Al layered double hydroxide (LDH) containing carbonate...

Word Count : 1068

Stichtite

Last Update:

Hydrotalcite group mineral...

Word Count : 302

Carbonate nitrate

Last Update:

are mixed anion compounds containing both carbonate and nitrate ions. Hydrotalcite can contain carbonate and nitrate ions between its layers. Magnesium...

Word Count : 1055

ATC code A02

Last Update:

Ordinary salt combinations A02AD02 Magaldrate A02AD03 Almagate A02AD04 Hydrotalcite A02AD05 Almasilate A02AF01 Magaldrate and antiflatulents A02AF02 Ordinary...

Word Count : 433

Tobermorite

Last Update:

aluminium silicate hydrate, (C-A-S-H) minerals: Hydrogarnet Hydrogrossular Hydrotalcite Katoite Tacharanite (Ca12Al2Si18O33(OH)36) Warr, L.N. (2021). "IMA–CNMNC...

Word Count : 939

Lakshmi Kantam

Last Update:

possible atom economy. In particular, utilization of nanomaterials, hydrotalcites and hydroxyapatites as supports and catalysts for asymmetric catalysis...

Word Count : 1172

Lithium aluminate

Last Update:

layered double hydroxide (LDH) with a crystal structure resembling that of hydrotalcite.[dubious – discuss][clarification needed] Lithium aluminate solubility...

Word Count : 1318

Barbertonite

Last Update:

1944). The rhombohedral hydrotalcite group consists of the minerals: stichtite with 3 units of Mg6Cr2(OH)16CO3·4H2O, hydrotalcite with 3 units of Mg6Al2(OH)16CO3·4H2O...

Word Count : 546

Polymer stabilizer

Last Update:

such as calcium stearate and zinc stearate, mineral agents, such as hydrotalcite and hydrocalumite, and basic metal oxides, such as calcium oxide, zinc...

Word Count : 2957

Fermagate

Last Update:

family of compounds also referred to as layered double hydroxides or hydrotalcites. The anions are held in this relatively insoluble structure in the spaces...

Word Count : 242
PDF Search Engine © AllGlobal.net