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Pale bluish, pale ...
A polytype of Cualstibite

The original name cyanophyllite, from the Greek for blue (κυανός) and a leaf (φύλλον), in allusion to the color and habit, was discredited in 2012 (IMA 12-B) during the definition of the hydrotalcite supergroup (Mills et al., 2012), since it was recognised as a polytype of cualstibite.

Classification of Cualstibite-1M

Discredited 2012
Explanation of status:
Discredited in 2012 IMA 12-B during the definition of hydrotalcite supergroup.

7 : Oxides and Hydroxides
13 : Oxides of As, Sb and Bi URL:
Please feel free to link to this page.

First Recorded Occurrence of Cualstibite-1M

Physical Properties of Cualstibite-1M

Diaphaneity (Transparency):
Transparent, Translucent
Pale bluish, pale blue-green, greenish

Crystallography of Cualstibite-1M

Crystal System:
Class (H-M):
2/m - Prismatic
Space Group:
Space Group Setting:
Cell Parameters:
a = 9.938(1) Å, b = 8.890(1) Å, c = 5.493(1) Å
β = 102.90(1)°
a:b:c = 1.118 : 1 : 0.618
Unit Cell Volume:
V 473.05 ų
Multiple twinning due to pseudotrigonal symmetry.
Originally assumed to be orthorhombic (Walenta, 1981).
X-Ray Powder Diffraction Data:
9.67 (6)
4.84 (10)
4.59 (4)
4.46 (4)
2.59 (6)
2.44 (5)
1.917 (4)

Chemical Properties of Cualstibite-1M

Essential elements:
All elements listed in formula:

Relationship of Cualstibite-1M to other Species


Other Names for Cualstibite-1M

Name in Other Languages:

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Cualstibite-1M

Reference List:
Walenta, K. (1981): Cyanophyllit, ein neues Mineral aus der Grube Clara bei Oberwolfach im mittleren Schwarzwald. Chem. Erde, 40, 195-200. (in German).

American Mineralogist: 66: 1274.

Walenta, K. (1984): Cualstibit, ein neues Sekundärmineral aus der Grube Clara im mittleren Schwarzwald (BRD). Chem. Erde 43, 255-260. (in German) [with revised formula of cyanophyllite]

Walenta, K. (1999): Zur Formel des Cyanophyllits. Erzgräber, 13, 45-46.

U. Kolitsch and G. Giester (2007): A preliminary determination of the crystal structure of cyanophyllite and revision of its chemical formula. Mitt. Österr. Mineral. Ges. 153, 66. (Abstract)

Mills, S.J., Christy, A.G., Génin, J.-M.R., Kameda, T. and Colombo, F. (2012): Nomenclature of the hydrotalcite supergroup: natural layered double hydroxides. Mineralogical Magazine, 76, 1289-1336.

Kolitsch, U., Giester, G. & Pippinger, T. (2013): The crystal structure of cualstibite-1M (formerly cyanophyllite), its revised chemical formula and its relation to cualstibite-1T. Mineral. Petrol. 107, 171-178.

Internet Links for Cualstibite-1M

Localities for Cualstibite-1M

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
  • Languedoc-Roussillon
    • Aude
      • Padern
Favreau G., Berbain C., Meisser N. (2003), Cyanophyllite et autres espèces rares de la mine du Tistoulet, Padern (Aude), Le Cahier des Micromonteurs, n°4, pp: 17-23
  • Lorraine
    • Vosges
      • Val-d'Ajol
Lheur C., Moreau F. (1994), Les minéralisations du filon du Bas Hérival près du Val d'Ajol (Vosges), Le Cahier des Micromonteurs, n°2, pp: 3-14
Germany (FRL)
  • Baden-Württemberg
    • Black Forest
      • Wolfach
        • Oberwolfach
          • Rankach valley
Chemie der Erde,(1981) 40, 195-200; Walenta, K. (1992): Die Mineralien des Schwarzwaldes. Chr. Weise Verlag, München, 336 pp. (in German); KOLITSCH, U. (1997): Uranosphärit und weitere neue Mineralfunde von der Grube Clara im Schwarzwald. Mineralien-Welt 8 (3), 18-26; Kolitsch, U., Giester, G. & Pippinger, T. (2013): The crystal structure of cualstibite-1M (formerly cyanophyllite), its revised chemical formula and its relation to cualstibite-1T. Mineral. Petrol. 107, 171-178.
  • North Rhine-Westphalia
    • Sauerland
      • Iserlohn
        • Letmathe
SCHNORRER-KÖHLER, G. (1986): Neue Minerale von der Schlackenhalde der ehemaligen Zinkhütte Genna in Letmathe/Sauerland. Aufschluss 37, 55-67.
  • Rhineland-Palatinate
    • Siegerland
      • Niederfischbach
Schnorrer-Köhler, G. (1989): Die Minerale der Grube Fischbacher Werk bei Niederfischbach im Bergamtsbezirk Betzdorf/Siegerland. Aufschluss, 40, 75-94 ; Weiss: "Mineralfundstellen, Deutschland West", 1990
  • Friuli-Venezia Giulia
    • Udine Province
      • Degano Valley
Sylvano IOB Collection
      • Forni Avoltri
EDX analysis by Italo Campostrini; Mills, S.J., Christy, A.G., Kampf, A.R., Housley, R.M., Favreau, G., Boulliard, J.-C., Bourgoin, V. (2012) Zincalstibite-9R: the first nine-layer polytype with the layered double hydroxide structure-type. Mineralogical Magazine, 76, 1337-1345.
South Africa
  • Northern Cape Province
    • Namakwa District (Namaqualand)
Cairncross, B. (2004): History of The Okiep Copper District, Namaqualand, Northern Cape Province, South Africa. Mineralogical Record 35(4) 289-317.
  • Wallis (Valais)
    • Anniviers Valley
      • Saint-Luc
Ansermet, S. (2012): Mines et minéraux du Valais - II. Anniviers et Tourtemagne. With contributions by N. Meisser, Ed. Porte-plumes (Ayer); - Ansermet, S. (2012): Mines et minéraux du Valais - II. Anniviers et Tourtemagne. With contributions by N. Meisser, Ed. Porte-plumes (Ayer); Ansermet, S. with contributions of Meisser, N. (2012): Mines et minéraux du Valais. II. Anniviers et Tourtemagne. Musée de la Nature (Sion), Musée Cantonal de Géologie (Lausanne), and Editions Porte-Plumes (Ayer), 374 pp.
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