Planetary Simulant Database

Free Resource for Regolith Simulant Information


Engelschiøn et al. provide a normative mineralogy for the basalt used in the simulant.

Component wt.%
Basalt 100%

Bulk Chemistry

From Schleppi et al. (2019)

Oxide Wt.%
SiO2 43.7
TiO2 2.4
Al2O3 12.6
FeO2O3 12.0
MnO 0.2
MgO 11.9
CaO 10.8
Na2O 2.9
K2O 1.3
P2O5 0.6
Total 98.4

Physical Properties

Property Value
Median grain size 11 μm
Bulk density 1.45g/cm3
Grain density 2.90g/cm3
Cohesion 0.38kPa

EAC-1 European Astronaut Center

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Simulant Name: EAC-1 European Astronaut Center
Availability: May Be Available
Fidelity: Standard
Developed By: European Space Agency
Available From: N/A
Publications: Engelschiøn, V. S. et al. (2020), EAC-1A: A novel large-volume lunar regolith simulant. Scientific Reports 10, 5473

EAC-1 is sourced from a basantie province in the Siebengebirge Volcanic Field in Germany. It is meant to be used for large-scale testing and technology maturation at the European Astronaut Center, specifically the European Lunar Exploration Laboratory (LUNA). The source material comes in five different size ranges, and a coarser, dust-free version will be used for the main regolith testbed at EAC, with a separate dust chamber filled with EAC-1A.

Engelschiøn et al. state that “where the properties of the dusty simulant have been measured, the figures are labelled with “EAC-1A”” to separate it from the base material which is simply called EAC-1. With a median particle size of 11 μm, EAC-1A is best considered as a dust simulant.

Nieke et al. (2019) provide methods for making thin films of EAC-1.

It isn't clear how much simulant has been produced or what the availability is.


Photographs of the EAC-1 simulant: