Description

Staurolite CAS NO 12182-56-8 is a nesosilicate mineral primarily composed of iron, aluminum, and silicon, known for its distinctive cross-shaped twinned crystals. This naturally occurring mineral is valued for its high density, chemical inertness, and hardness, making it a critical material in specialized industrial applications. It is essential for manufacturers in the foundry, abrasives, and water filtration industries seeking reliable, high-performance mineral additives.

Application

• Foundry Sand Additive: Used as a high-density facing sand in metal casting to improve mold stability and produce smoother casting surfaces.
• Abrasive Media: Employed in blasting and polishing applications due to its inherent hardness and angular grain structure.
• Water Filtration Media: Serves as a high-specific-gravity media in deep-bed multimedia filters for removing suspended solids.
• Radiation Shielding Aggregate: Utilized in specialized concrete formulations where high-density aggregates are required for shielding.
• Proppant in Hydraulic Fracturing: Acts as a durable, high-strength proppant to keep fractures open in oil and gas well stimulation.
• Mineral Specimen & Lapidary: Supplied in collector-grade forms for educational, display, and gemstone cutting purposes.

Basic Information

Product Name	Staurolite
CAS No.	12182-56-8
Molecular Formula	Fe2+2Al9O6(SiO4)4(O,OH)2
Molecular Weight	811.89 g/mol (approx.)
Synonyms	Cross Stone; Fairy Stone; Grenatite; Staurotide; Lapis Crucifer; Iron Aluminum Silicate Hydroxide; (Fe,Mg,Zn)2Al9(Si,Al)4O22(OH)2
EINECS	235-334-8

Quality Control

Our Staurolite is sourced and processed under strict quality protocols to ensure batch-to-batch consistency for industrial applications. Quality is verified through parameters including mineralogical composition, particle size distribution (PSD), bulk density, and acid solubility. A Certificate of Analysis (COA) detailing these specifications is provided with each shipment to guarantee it meets your technical requirements.

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 away from strong acids. The material is not hygroscopic under normal conditions but should be protected from excessive moisture to prevent caking.

Specification

Item	Specification
Appearance	Brown to reddish-brown granular solid
Mineralogical Purity (Staurolite)	≥ 95%
Bulk Density	2.7 - 3.0 g/cm³
Mohs Hardness	7.0 - 7.5
Specific Gravity	3.65 - 3.80
Acid Solubility (in HCl)	≤ 2%
Moisture Content	≤ 0.5%
Particle Size (Standard Grade)	Customizable (e.g., 20/40 mesh, 40/70 mesh)

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