Cualstibite-1M
A structural variant of Cualstibite
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About Cualstibite-1M
Formula:
(Cu,Al)3(OH)6[Sb5+(OH)6]
Ideal Cu:Al ratio is 2:1; very minor Mg may replace some of the Cu (Kolitsch et al., 2013).
Colour:
Pale bluish, pale blue-green, greenish
Lustre:
Vitreous
Crystal System:
Monoclinic
Name:
Polytype of cualstibite.
First Recorded Locality:
A polytype of Cualstibite
The original name cyanophyllite (given by K. Walenta in 1981), 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.
The original name cyanophyllite (given by K. Walenta in 1981), 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.
Unique Identifiers
Mindat ID:
1202
Long-form identifier:
mindat:1:1:1202:3
Classification of Cualstibite-1M
7.13.8
7 : Oxides and Hydroxides
13 : Oxides of As, Sb and Bi
7 : Oxides and Hydroxides
13 : Oxides of As, Sb and Bi
Physical Properties of Cualstibite-1M
Chemistry of Cualstibite-1M
Mindat Formula:
(Cu,Al)3(OH)6[Sb5+(OH)6]
Ideal Cu:Al ratio is 2:1; very minor Mg may replace some of the Cu (Kolitsch et al., 2013).
Ideal Cu:Al ratio is 2:1; very minor Mg may replace some of the Cu (Kolitsch et al., 2013).
Element Weights:
Crystallography of Cualstibite-1M
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 9.938(1) Å, b = 8.890(1) Å, c = 5.493(1) Å
β = 102.90(1)°
β = 102.90(1)°
Ratio:
a:b:c = 1.118 : 1 : 0.618
Unit Cell V:
473.05 ų
Z:
2
Twinning:
Multiple twinning due to pseudotrigonal symmetry.
Comment:
Originally assumed to be orthorhombic (Walenta, 1981).
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 9.67 Å | (6) |
| 4.84 Å | (10) |
| 4.59 Å | (4) |
| 4.46 Å | (4) |
| 2.59 Å | (6) |
| 2.44 Å | (5) |
| 1.917 Å | (4) |
First Recorded Occurrence of Cualstibite-1M
Synonyms of Cualstibite-1M
Other Language Names for Cualstibite-1M
German:Cualstibit-1M
Common Associates
Associations Based on Photo Data:
| 10 photos of Cualstibite-1M associated with Azurite | Cu3(CO3)2(OH)2 |
| 3 photos of Cualstibite-1M associated with Cualstibite | Cu2Al(OH)6[Sb5+(OH)6] |
| 3 photos of Cualstibite-1M associated with Bariopharmacosiderite | Ba0.5Fe3+4(AsO4)3(OH)4 · 5H2O |
| 3 photos of Cualstibite-1M associated with Cornwallite | Cu5(AsO4)2(OH)4 |
| 3 photos of Cualstibite-1M associated with Quartz | SiO2 |
| 3 photos of Cualstibite-1M associated with Cyanotrichite Group | |
| 2 photos of Cualstibite-1M associated with Malachite | Cu2(CO3)(OH)2 |
| 2 photos of Cualstibite-1M associated with 'Cualstibite-1T' | Cu2AlSb(OH)12 |
| 1 photo of Cualstibite-1M associated with Allophane | (Al2O3)(SiO2)1.3-2 · 2.5-3H2O |
| 1 photo of Cualstibite-1M associated with Dundasite | PbAl2(CO3)2(OH)4 · H2O |
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.
Internet Links for Cualstibite-1M
mindat.org URL:
https://www.mindat.org/min-1202.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Cualstibite-1M
Reference List:
Walenta, K. (1984): Cualstibit, ein neues Sekundärmineral aus der Grube Clara im mittleren Schwarzwald (BRD). Chemie der Erde 43, 255-260. (in German)[with revised formula of cyanophyllite]
Localities for Cualstibite-1M
Showing 14 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Austria | |
| Auer et al. (2017) |
| Auer et al. (2017) |
| Auer (2019) |
France | |
| Escande et al. (1973) +6 other references |
| Escande et al. (1973) +6 other references | |
| Favreau et al. (2003) |
Germany (FRL) | |
| Walenta (1981) +4 other references |
| Schnorrer-Köhler (1986) +1 other reference |
| Schnorrer-Köhler (1989) +1 other reference |
Greece | |
| Rieck et al. (2022) |
Italy | |
| Sylvano IOB Collection |
| EDX analysis by Italo Campostrini +1 other reference |
South Africa | |
| Cairncross (2004) |
Switzerland | |
| Ansermet (2012) +2 other references |
Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany