Description

Nepheline Syenite is a naturally occurring, silica-deficient feldspathic rock composed primarily of nepheline, microcline, albite, and minor minerals. Its core value proposition lies in its ability to act as a highly effective and economical fluxing agent, significantly lowering the melting temperature and viscosity of ceramic and glass batches. This makes it a critical raw material for manufacturers in the ceramics, glass, paint, polymer, and construction industries seeking to optimize production efficiency and enhance product properties.

Application

• Ceramics & Sanitaryware: A primary flux in body and glaze formulations for floor/wall tiles, tableware, and sanitaryware, promoting vitrification, reducing firing temperatures, and improving mechanical strength and whiteness.
• Glass Manufacturing: Used as a source of alumina and alkali (Na2O, K2O) in container, fiberglass, and specialty glass, enhancing chemical durability, viscosity control, and acting as an alternative to feldspar.
• Paints & Coatings: Functions as an extender and filler pigment, improving film durability, scrub resistance, sheen control, and tint retention while reducing formulation costs.
• Plastics & Polymers: Serves as a functional filler in PVC, polyolefins, and engineering plastics to enhance stiffness, dimensional stability, heat deflection temperature, and surface finish.
• Construction Materials: Incorporated into cementitious products, mortars, and grouts to modify setting properties and improve long-term performance.
• Abrasive Products: Used as a component in bonded abrasives like grinding wheels due to its hardness and thermal properties.

Basic Information

Product Name	Nepheline Syenite
CAS No.	37244-96-5
Molecular Formula	Complex silicate mixture (primarily (Na,K)AlSiO4)
Molecular Weight	N/A (Natural mineral blend)
Synonyms	Nepheline Syenite Powder; Foid Syenite; Silica-Deficient Feldspar; Nepheline Syenite Rock; K-Na Feldspathoid; Litchfieldite (a variety); Miaskite (a variety); Elaeolite Syenite
EINECS	Contact for details

Quality Control

Our Nepheline Syenite is sourced and processed under strict quality protocols to ensure batch-to-batch consistency. Quality is verified against key chemical and physical parameters, including chemical composition (SiO2, Al2O3, Na2O, K2O, Fe2O3), particle size distribution, and brightness. Certificates of Analysis (COA) documenting these specifications are available for every shipment upon request.

Storage

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

Specification

Item	Specification
Appearance	White to off-white powder
Chemical Composition (Typical)	Contact for details
SiO2 Content	55 - 62 %
Al2O3 Content	22 - 26 %
Na2O + K2O Content	13 - 16 %
Fe2O3 Content (max)	0.08 - 0.15 %
Particle Size (e.g., -200 mesh / D50)	Customizable
Brightness (ISO)	85 - 92 %
Loss on Ignition (LOI)	< 0.5 %

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