Buy Reynolds Cup Reference Mixtures

The samples labeled with RCx_y are mixtures prepared from purified reference minerals, representing clay-bearing rocks, soils or raw materials in the broadest sense. The materials were designed for testing the performance of methods in qualitative and quantitative mineral phase analysis in previous Reynolds Cup contests.

The organizers made great efforts to prepare homogeneous and well defined samples. However, as absolutely pure minerals are hard to obtain in amounts suitable for preparing some hundred grams of mixture, some minor impurities of the reference materials must be taken into account. Of course the degree of purity varies between the different reference materials, but in total the accuracy of the given mineralogical composition of a single sample can be estimated to be better than 1 % absolute bias. This means that the uncertainty of the percentage of a component should not be bigger than 1 % relatively for the major constituents and 0.1 % absolutely for the trace minerals.

The aliquots of the sample mixtures have been tested carefully for representativeness by XRF and XRD analysis. But according to the limited amount of 2-4 grams, the delivered samples cannot be split further into subsamples without additional milling and homogenization.

Some samples contain sensitive minerals like bassanite, halite, pyrite or nahcolite as minor constituents. Their stability cannot be guaranteed during handling and long-time storage.

In general, please note that the mixtures are not prepared and checked in a complete procedure of certification. Therefore, there is no warranty for the trueness of the mineralogical composition as given in the data sheets. The Clay Minerals Society hereby explicitly excludes all responsibility for the usability of the mixtures in any calibration or test procedure.

Rate: US$ 250 per unit (2-4 grams)

Samples available and nominal compositions:

  • RC5_1 Type: Clay-rich sediment from an evaporate environment
  • RC5_2 Type: Clay that might be encountered in a hydrothermal alteration
  • RC5_3 Type: Clay-rich soil formed on a parent material rich in ferromagnesian minerals and amorphous soil minerals
  • RC6_1 Type: Petroleum shale
  • RC6_2 Type: Ni laterite profile
  • RC6_3 Type: Bauxite profile
  • RC7_1 Type: Sulphate rock (Gypsifereous Keuper)
  • RC7_2 Type: Bentonite, sodium activated
  • RC8_1 Type: Fine fraction of a tailing processed from a greisen-type tin ore
  • RC8_3 Type: Altered/weathered ultrabasite rock
  • RC9_1 Type: Fine fraction of a Sabkha deposit
  • RC9_2 Type: Weathered marine deposit
  • RC9_3 Type: Carbonatite deposit

Mixture RC5_1
Mineral
Quartz
Albite
Calcite
Dolomite-ferroan
Magnesite
Anhydrite
Gypsum
Arcanite
Halite
Talc
Montmorillonite
Smectite (trioctahedral)
Corrensite
Sepiolite
Palygorskite


Mass%

5.5
5.0
6.0
6.8
5.1
5.2
5.1
2.7
2.9
11.8
5.1
1.0
4.1
18.7
15.2

Mixture RC5_2
Mineral
Quartz
Microcline
Albite
Gibbsite
Anatase
Calcite
Huntite
Barite
Barite Sr-rich
Alunite
Fluorite
Pyrite
Kaolinite (disordered)
Halloysite (10 Å)
Illite-smectite
Illite-smectite (dioctahedral)
Muscovite 2M1


Mass%
2.2
8.2
0.5
9.6
2.3
0.1
5.0
2.4
3.5
10.7
1.9
0.1
14.3
19.9

14.3

5.1

Mixture RC5_3
Mineral
Quartz
Actinolite
Epidote
Goethite
Birnessite
Anatase
High Mg-calcite
Aragonite
Allophane
2-line ferrihydrite
Tourmaline
Talc
Kaolinite (disordered)
Mica (dioctahedral)
Saponite
Biotite
Vermiculite (trioctahedral)
Chlorite (trioctahedral)


Mass%
9.7
4.0
4.0
7.8
2.0
0.1
9.0
3.0
10.3
7.9
0.3
0.1
6.6

0.1
5.1
4.4
11.2

14.2

Mixture RC6_1
Mineral
Quartz
Orthoclase
Albite
Pyrite
Halite
Calcite
Dolomite/ankerite
Mg-siderite
Barite (Sr)
Anatase
Kaolinite (ordered)
Montmorillonite
Illite-smectite (dioctahedral)
Illite 1Md (Fe-rich)
Muscovite 2M1


Mass%
11.1
1.8
5.8
2.0
5.0
9.7
0.3
5.0
4.0
0.3
6.9
15.0
11.0

10.0
12.1

Mixture RC6_2
Mineral
Quartz
Microcline
Orthoclase
Albite
Goethite
Hematite
Magnetite
Magnesite
Talc
Kaolinite (disordered)
Nontronite
Lizardite
Biotite
Chlorite (trioctahedral)


Mass%
16.3
5.7
0.1
4.8
6.3
9.4
5.3
5.2
5.0
7.4

13.6
7.7
6.2
7.0

Mixture RC6_3
Mineral
Quartz
Goethite
Hematite
Magnetite
Gibbsite
Boehmite
Anatase
Rutile
Ilmenite
Zircon
Gamma-alumina
2-line ferrihydrite
Kaolinite (disordered)
Halloysite (7 Å)
Muscovite 2M1


Mass%
11.1
1.8
5.8
2.0
5.0
9.7
0.3
5.0
4.0
0.3
6.9
15.0
11.0

10.0
12.1

Mineral RC7_1
Mineral
Quartz
Orthoclase/adularia
Albite
Oligoclase
Pyrite
Hematite
Gypsum
Anhydrite
Bassanite
Calcite
Dolomite
Magnesite
Rutile
Tourmaline
Apatite
Celestine
Amphibole (hornblende)
Ca-Montmorillonite
Illite-smectite (dioctahedral)
Muscovite 2M1
Biotite
Chlorite (trioctahedral)


Mass%
5.1
2.0
2.1
1.0
1.9
1.0
21.8
22.7
1.1
2.4
16.5
2.6
1.1
0.7
1.1
1.3
1.4
2.4
2.4

2.4
1.2
5.8

Mineral RC7_2
Mineral
Quartz
Microcline
Orthoclase/adularia
Albite
Oligoclase
Pyrite
Gypsum
Calcite
Anatase
Rutile
Heulandite
Nahcolite
Cristobalite
Silica
Ca-montmorillonite
Na-montmorillonite
Illite-smectite (dioctahedral)
Illite 1Md
Muscovite 2M1
Chlorite (trioctahedral)


Mass%
7.3
2.4
3.4
6.2
1.5
0.8
1.3
2.5
1.2
1.2
2.2
2.5
3.9
9.2
29.4
10.8
4.6

2.6
5.1
1.9

Mixture RC7_3
Mineral
Quartz
Orthoclase/adularia
Albite
Pyrite
Goethite
Hematite
Magnetite
Gibbsite
Boehmite
Anatase
Tourmaline
Zircon
2-line ferrihydrite
Kaolinite (ordered)
Kaolinite (disordered)
Halloysite (7 Å)
Ca-montmorillonite
Illite-smectite (dioctahedral)
Muscovite
Chlorite (trioctahedral)


Mass%
19.9
4.0
2.0
1.8
1.6
1.4
1.0
2.1
8.3
3.0
0.8
1.2
2.0
1.9
20.6

11.2
2.7
5.0

8.2
1.5

Mixture RC8_1
Mineral
Quartz
Albite
Fluorite
Apatite
Topaz
Hematite
Casserite
Tourmaline
Anatase
Kaolinite ordered
Dickite
Muscovite 2M1
Illite 1Mtv
Zinnwaldite
Chlorite


Mass%
19.8
4.2
2.0
1.7
10.8
6.2
0.3
1.8
1.4
11.1

4.0
8.1
5.0
19.7
3.9

Mixture RC8_2
Mineral
Quartz
Adularia
Albite
Calcite
Dolomite/
   Ankerite
Pyrite
Rutile
Anatase
Anthracite/
   amorphous
Kaolinite disordered
Illite 1Mtv
Muscovite 2M1
Montmorillonite
Chlorite


Mass%
15.7
3.4
4.0
11.4
6.4

2.5
0.1
2.3
5.0

12.6

7.8
12.0
11.4
5.5

Mixture RC8_3
Mineral
Quartz
Calcite
Magnesite
Magnetite
Hematite
Goethite
Anatase
Silica glass/ amorphous
Saponite
Vermiculite
Chlorite (Mg)
Antigorite
Talc


Mass%
3.8
2.3
5.7
0.9
4.8
6.7
1.1
6.9

27.0
5.3
7.3
22.8
5.4

Mixture RC9_1
Mineral
Quartz
Calcite
Dolomite/ankerite
Magnesite
Gypsum
Sulphur
Halite
Sylvite
Stilbite/Stellerite
Cryolite
Amorphous group (Opal A & CT)
Mixed-layer (dioctahedral-Illite-Smectite R1)
Smectite (dioctahedral-Montmorillonite (Ca,Na))
Smectite (trioctahedral-Saponite)
Palygorskite
Sepiolite


Mass%
25.4
3.4
6
0.5
3.7
2.6
4.3
0.3
1.3
0.5
7




6.3



8.9



12.3
7.5
10

Mixture RC9_2
Mineral
Quartz
K-Feldspar group (orthoclase)
Plagioclase group (albite)
Gypsum
Goethite
Vivanite
Rutile 
Anatase
Amorphous group (ferrihydrite 2-line)
Kaolinite (disordered)
Halloysite
Mica (dioctahedral) – Illite 1M/disordered
Mixed-layer (dioctahedral)- Glauconite-Smectite R1
Smectite (dioctahedral)- Montmorillonite (Ca, Na)
Chlorite (trioctahedral) (Fe, Mg)


Mass%
14.7
5.4

2.1

3.4
3.4
0.3
1.0
3.3
7.3

10.6
7.2
8.3

3.6

12.2

13.8

3.4

Mixture RC9_3
Mineral
Calcite
Dolomite/Ankerite
Witherite
Fluorite
Apatite
Diopside (clinopyroxene)
Forsterite (olivine)
Sodalite
Barite
Vanadinite
Zircon
Dravite (Tourmaline)
Mica (trioctahedral) – Biotite 2M1
Mica (trioctahedral) – Phlogopite 1M
Talc
Vermiculite (trioctahedral)
Chlorite (trioctahedral) (Fe, Mg)


Mass%
13.9
21.9
6.4
3.9
3.4
6.7

7.0

2.5
2.6
0.8
0.4
1.0

3.4


8.5


8.0
5.3

5.3