14457-84-2

Basic information

• Product Name: DIASPORE
• Synonyms: DIASPORE
• CAS NO: 14457-84-2
• Molecular Formula: AlHO₂
• Molecular Weight: 0
• Mol File: 14457-84-2.mol
• Article Data: 3

Chemical Properties

• Appearance: /orthorhombic crystals
• Density: 3.440
• Water Solubility: insoluble H2O; soluble hot acids, hot alkalies [CRC10]
• CAS DataBase Reference: DIASPORE(CAS DataBase Reference)
• NIST Chemistry Reference: DIASPORE(14457-84-2)
• EPA Substance Registry System: DIASPORE(14457-84-2)

Safety Data

• Hazardous Substances Data: 14457-84-2(Hazardous Substances Data)

Usage

Description

DIASPORE, also known as diaspore, is a mineral form of mixed aluminium oxide and hydroxide with the chemical formula AlO.OH. It has an orthorhombic crystal structure with specific lattice parameters and a hardness of 6.5–7 on the Mohs scale. DIASPORE is stable within a temperature range of 275°C to 425°C.

Uses

Used in Ceramic Industry:
DIASPORE is used as a raw material for the production of various ceramics due to its unique chemical and physical properties. Its stability at high temperatures and hardness make it suitable for creating durable and heat-resistant ceramic products.
Used in Refractory Industry:
In the refractory industry, DIASPORE is utilized as a component in the manufacturing of high-temperature resistant materials. Its ability to maintain stability within a wide temperature range makes it an ideal choice for applications that require heat insulation and resistance.
Used in Chemical Industry:
DIASPORE is employed as a catalyst or catalyst support in various chemical processes due to its chemical properties and structural stability. Its resistance to high temperatures and chemical reactivity make it a valuable asset in the chemical industry.
Used in Construction Industry:
In the construction industry, DIASPORE is used as an additive to enhance the strength and durability of concrete and other building materials. Its hardness and stability contribute to the overall performance and longevity of these materials.
Used in Environmental Applications:
DIASPORE can be used in environmental applications for the removal of pollutants and contaminants from soil and water. Its chemical properties allow it to adsorb and immobilize harmful substances, making it a potential candidate for environmental remediation efforts.

Synthetic route

aluminum(III) nitrate nonahydrate → aluminum oxyhydroxide (14457-84-2)

Conditions	Yield
In ethanol annealing at 20 .degre.C 2 h in air, according to T. F. Baumann et al., Chem. Mater. 17, 395 (2005);

aluminium trichloride (7446-70-0) + sodium hydrogencarbonate (144-55-8) + cobalt(II) chloride (7646-79-9) + sodium hydroxide (1310-73-2) + zinc(II) chloride (7646-85-7) → dawsonite + aluminum oxyhydroxide (14457-84-2) + Zn0328Co0338Al0.333(OH)2(C(01)O3)66

Conditions	Yield
In water CoCl2, AlCl3, ZnCl2 slowly added to soln. of NaOH and NaHCO3 at room temp. for 3-4 h, stirred for 14-20 h, pH 9.3-9.9, dried, washed with H2O, air flow for 2 h, spread on glass plate to dry at room temp. for 4-5 d; elem. anal.;

aluminium trichloride (7446-70-0) + sodium hydrogencarbonate (144-55-8) + cobalt(II) chloride (7646-79-9) + sodium hydroxide (1310-73-2) → dawsonite + aluminum oxyhydroxide (14457-84-2) + Co0667Al0.333(OH)2(C(01)O3)66

Conditions	Yield
In water CoCl2, AlCl3 slowly added to soln. of NaOH and NaHCO3 at room temp. for 3-4 h, stirred for 14-20 h, pH 9.3-9.9, dried, washed with H2O, air flowfor 2 h, spread on glass plate to dry at room temp. for 4-5 d; elem. anal.;

aluminum trihydroxide + aluminum oxide (1333-84-2, 1344-28-1) + silica gel (112926-00-8, 7631-86-9) → aluminum oxyhydroxide (14457-84-2) + hydrous aluminium silicate + topaz

Conditions	Yield
In neat (no solvent) High Pressure; mixture heated at 9 GPa and 910 °C for 3 h or 11 GPa and 1000 °C for 6 h;

aluminum oxyhydroxide (14457-84-2) → corundum

Conditions	Yield
In neat (no solvent) calcined at 1000 - 1300 °C for 2 h; Raman, FT-IR, luminescence spectroscopy;
heating at 500 °C;;
In solid heating diaspore at 1000°C for 3 h;

aluminum oxyhydroxide (14457-84-2) + phosphoric acid (86119-84-8, 7664-38-2) → Al2O3#dotP

Conditions	Yield
In water α-AlOOH suspended in soln. of H3PO4, stirred for 2 h at room temp., dehydrated at 90 °C under sirring, calcined in air at 400 or 500 ° C for 6 h, sintered at 1000 °C;

Iron(III) nitrate nonahydrate + aluminum oxyhydroxide (14457-84-2) → Fe-doped alumina

Conditions	Yield
In water α-AlOOH suspended in soln. of Fe nitrate, stirred for 2 h at room temp., dehydrated at 90 °C under sirring, calcined in air at 400 or 500 ° C for 6 h, sintered at 1000 °C;

magnesium(II) nitrate hexahydrate + aluminum oxyhydroxide (14457-84-2) → Al2O3#dotMg

Conditions	Yield
In water α-AlOOH suspended in soln. of Mg nitrate, stirred for 2 h at room temp., dehydrated at 90 °C under sirring, calcined in air at 400 or 500 ° C for 6 h, sintered at 1000 °C;

Upstream product

• 7446-70-0 aluminium trichloride 
• 144-55-8 sodium hydrogencarbonate 
• 7646-79-9 cobalt(II) chloride 
• 1310-73-2 sodium hydroxide 
• 7646-85-7 zinc(II) chloride 
• 1333-84-2 aluminum oxide 
• 112926-00-8 silica gel 

Relevant articles and documents

Nanoengineering mechanically robust aerogels via control of foam morphology

Potential of aerogels for technological applications is often limited by their poor mechanical properties. Here, we demonstrate that alumina aerogel monoliths with excellent mechanical properties can be made by controlling the crystallographic phase, shape, and size of nanoligaments. In particular, we show that thermal processing of aerogels with a morphology of interconnected nanoleaflets causes dehydration and associated curling of the nanoleaflets, resulting in a dramatic improvement of mechanical properties. This study shows an effective way to control mechanical properties of the nanoporous solids that can be synthesized with ligaments having a quasi-two-dimensional shape, such as platelets, ribbons, or leaflets.

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