Advance your rare earth element analysis with the Alloy Geek Rare Earth Element Reference Material - Med, also known as AG-REE-MED. This Reference Material (RM) is expertly manufactured from a blended carbonatite ore and Georgia-sourced calcium carbonate, delivering a reliable total light rare earth content of 0.74 wt%.

Certified under ISO 17034 and suitable for XRF, this mid-level REE standard is optimized for calibration, quality control, and method validation in geochemical and industrial laboratories.

Key Features:

• ISO 17034 Reference Material
• Light Rare Earth Element (LREE) Content: 0.74 wt%
• Compatible with XRF
• Made in the USA with High Purity CaCO₃ and LREE Ore
• Backed by Alloy Geek’s Expert Support and Same-Day Shipping

Applications:

• Instrument calibration and standardization
• Rare earth element method validation
• Quality assurance for geochemical labs
• Analytical research involving LREE in carbonate rock matrices

Certified Composition:

Major Elements (wt% and Oxide Equivalents):

Element	wt%	Oxide	wt%
Al	0.15	Al₂O₃	0.29
Ba	1.7	BaO	1.9
Ca	34.4	CaO	48.1
Ce	0.37	CeO₂	0.45
Fe*	0.30	Fe₂O₃	0.42
K	0.038	K₂O	0.045
La	0.26	La₂O₃	0.30
Mg	1.7	MgO	2.9
Mn	0.047	MnO	0.061
Nd	0.089	Nd₂O₃	0.10
P	0.053	P₂O₅	0.12
Pr	0.031	Pr₆O₁₁	0.038
S	0.51	SO₃	1.3
Si	1.2	SiO₂	2.6
Sr	0.38	SrO	0.44
Ti	0.012	TiO₂	0.019
LREE	0.74	LREEO	0.89

*Iron reported as Fe₂O₃ (ferric oxide equivalent)
LREE: Light Rare Earth Elements total
LREEO: Total as Oxides

Loss on Ignition (LOI): 40.4 wt% (110 °C to 1000 °C)

Trace Elements (mg/kg):

Element	Value (mg/kg)	Element	Value (mg/kg)	Element	Value (mg/kg)
Dy	5.6	Pb	383	Th	25
Eu	10	Rb	1.7	U	3.9
Ho	0.76	Sc	1.5	Y	21
Lu	0.15	Sm	61	Yb	0.98
Nb	5.3

 

Produced to ISO 17034 with ISO/IEC 17025 Accredited Chemical Testing in an ISO 9001 Certified Quality Management System.

Available as powder pressed into a 32mm sample cup. XRF Film provided is 6um XRF grade polypropylene. End user may swap film to the film of their liking. Amount of sample: 10g.