Description

Nephelin CAS NO 1302-72-3 is a naturally occurring tectosilicate mineral belonging to the feldspathoid group, primarily composed of sodium, potassium, and aluminum silicates. This material is valued for its high alumina content and low silica ratio, making it a strategic alternative raw material in several industrial processes. It is a critical component for manufacturers in the glass, ceramics, and construction materials sectors seeking cost-effective and efficient sources of alumina and alkalis.

Application

• Glass Manufacturing: Used as a fluxing agent and a source of alumina (Al₂O₃) and alkalis (Na₂O, K₂O) in the production of specialty glasses, fiberglass, and container glass, reducing melting temperatures and energy consumption.
• Ceramics Industry: Acts as a key raw material in ceramic bodies and glazes, contributing to vitrification, strength, and thermal stability of the final product.
• Construction Materials: Utilized in the production of geopolymer cements and alkali-activated binders as a sustainable, low-CO₂ alternative to Portland cement.
• Refractory Production: Serves as a component in certain refractory formulations due to its high-temperature properties.
• Filler and Extender: Employed as an inert filler in paints, plastics, and rubber compounds to modify physical properties and reduce costs.
• Source of Aluminum: Investigated as a potential non-bauxite source for alumina extraction in the aluminum production chain.
• Soil Amendment: Applied in agriculture to adjust soil pH and provide a slow-release source of potassium and other trace elements.

Basic Information

Product Name	Nephelin
CAS No.	1302-72-3
Molecular Formula	(Na,K)AlSiO₄
Molecular Weight	~142.1 g/mol (for NaAlSiO₄ endmember)
Synonyms	Nepheline; Nephelite; Nepheline Syenite (rock form); Elaeolite; Sodium Potassium Aluminum Silicate; (Na,K)-Aluminosilicate; Feldspathoid N
EINECS	215-089-6

Quality Control

Our Nephelin is sourced and processed under strict quality protocols to ensure batch-to-batch consistency for industrial applications. Quality is verified through analysis of key parameters including chemical composition (Al₂O₃, SiO₂, Na₂O, K₂O, Fe₂O₃ content), particle size distribution, and loss on ignition. Certificates of Analysis (COA) detailing these specifications are provided with every shipment to guarantee compliance with your production requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep the container sealed when not in use to prevent moisture absorption and contamination from dust or other particulates. Store away from incompatible materials such as strong acids.

Specification

Item	Specification
Appearance	White to grayish-white powder or granules
Identification (XRD)	Complies
Assay (as Al₂O₃)	29.0 - 34.0 %
Assay (as Na₂O + K₂O)	19.0 - 22.0 %
Silicon Dioxide (SiO₂)	55.0 - 62.0 %
Iron (as Fe₂O₃)	≤ 0.2 %
Loss on Ignition (LOI)	≤ 1.5 %
Particle Size (D50)	Contact for details

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.