Otavite
A valid IMA mineral species - grandfathered
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About Otavite
Formula:
CdCO3
Colour:
White to yellow-brown or reddish
Lustre:
Adamantine, Vitreous
Hardness:
3½ - 4
Specific Gravity:
4.96
Crystal System:
Trigonal
Member of:
Name:
Named in 1906 by Otto Schneider for Otavi Mountains, Namibia, that include the type locality of the Tsumeb Mine.
Isostructural with:
Unique Identifiers
Mindat ID:
3040
Long-form identifier:
mindat:1:1:3040:9
GUID
(UUID V4):
(UUID V4):
4e181b5f-8921-4a1b-a76e-50efb88c1894
IMA Classification of Otavite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Cd(CO3)
First published:
1906
Classification of Otavite
5.AB.05
5 : CARBONATES (NITRATES)
A : Carbonates without additional anions, without H2O
B : Alkali-earth (and other M2+) carbonates
5 : CARBONATES (NITRATES)
A : Carbonates without additional anions, without H2O
B : Alkali-earth (and other M2+) carbonates
14.1.1.7
14 : ANHYDROUS NORMAL CARBONATES
1 : A(XO3)
14 : ANHYDROUS NORMAL CARBONATES
1 : A(XO3)
11.6.10
11 : Carbonates
6 : Carbonates of Zn and Cd
11 : Carbonates
6 : Carbonates of Zn and Cd
Mineral Symbols
As of 2021 there are now IMAâCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Ota | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of Otavite
Pronunciation:
Play | Recorded by | Country |
---|---|---|
Jolyon Ralph | United Kingdom | |
Debbie Woolf | United Kingdom |
Physical Properties of Otavite
Adamantine, Vitreous
Transparency:
Translucent
Colour:
White to yellow-brown or reddish
Comment:
yellowish brown to reddish brown if impure
Streak:
White
Hardness:
3½ - 4 on Mohs scale
Cleavage:
Imperfect/Fair
On {1011}
On {1011}
Density:
4.96 g/cm3 (Measured) 5.03 g/cm3 (Calculated)
Optical Data of Otavite
Type:
Uniaxial (-)
RI values:
nω = 1.830 nε = 1.605
Max Birefringence:
δ = 0.225
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
High
Pleochroism:
Non-pleochroic
Comments:
colorless in thin section
Chemistry of Otavite
Mindat Formula:
CdCO3
Elements listed:
CAS Registry number:
Crystallography of Otavite
Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
R3c
Setting:
R3c
Cell Parameters:
a = 4.93 Å, c = 16.27 Å
Ratio:
a:c = 1 : 3.3
Unit Cell V:
342.46 Ă
Âł (Calculated from Unit Cell)
Z:
6
Morphology:
Crusts of minute rhombohedral crystals, {101_1}.
Twinning:
observed
Comment:
synthetic
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0000103 | Otavite | Graf D L (1961) Crystallographic tables for the rhombohedral carbonates American Mineralogist 46 1283-1316 | 1961 | 0 | 293 | ||
0018091 | Otavite | Zachariasen W (1928) Untersuchungen ueber die Kristallstruktur von Sesquioxyden und Verbindungen A B O3 _cod_database_code 1011341 Skrifter utgitt av det Norske Videnskaps-Akademi i Oslo 1928 1-165 | 1928 | 0 | 293 |
CIF Raw Data - click here to close
Epitaxial Relationships of Otavite
Epitaxial Minerals:
Smithsonite | ZnCO3 |
Epitaxy Comments:
Otavite oriented growths on smithsonite (Tsumeb).
X-Ray Powder Diffraction
Image Loading
Radiation - Copper Kα
Data courtesy of RRUFF project at University of Arizona, used with permission.
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.95 Ă | (100) |
3.78 Ă | (80) |
2.46 Ă | (35) |
1.825 Ă | (35) |
2.066 Ă | (25) |
1.838 Ă | (25) |
1.582 Ă | (16) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 7: Great Oxidation Event | <2.4 |
47c : [Carbonates, phosphates, borates, nitrates] |
Type Occurrence of Otavite
Place of Conservation of Type Material:
n.d.
Associated Minerals at Type Locality:
Reference:
Schneider, O. (1906) VorlĂ€ufige Notiz ĂŒber einige sekundĂ€re Minerlien von Otavi (Deutsch SĂŒd-West-Afrika), darunter ein neues Cadmium-Mineral. Centralblatt fĂŒr Mineralogie, Geologie und PalĂ€ontologie: 1906: 388-389.
Other Language Names for Otavite
Relationship of Otavite to other Species
Member of:
Other Members of this group:
Calcite | CaCO3 | Trig. 3m (3 2/m) : R3c |
Gaspéite | NiCO3 | Trig. 3m (3 2/m) : R3c |
Magnesite | MgCO3 | Trig. 3m (3 2/m) : R3c |
Rhodochrosite | MnCO3 | Trig. 3m (3 2/m) : R3c |
Siderite | FeCO3 | Trig. 3m (3 2/m) : R3c |
Smithsonite | ZnCO3 | Trig. 3m (3 2/m) : R3c |
Spherocobaltite | CoCO3 | Trig. 3m (3 2/m) : R3c |
Common Associates
Associated Minerals Based on Photo Data:
9 photos of Otavite associated with Smithsonite | ZnCO3 |
7 photos of Otavite associated with Cerussite | PbCO3 |
6 photos of Otavite associated with Azurite | Cu3(CO3)2(OH)2 |
5 photos of Otavite associated with Malachite | Cu2(CO3)(OH)2 |
4 photos of Otavite associated with Duftite | PbCu(AsO4)(OH) |
4 photos of Otavite associated with Minrecordite | CaZn(CO3)2 |
3 photos of Otavite associated with Chalcedony | SiO2 |
3 photos of Otavite associated with Hemimorphite | Zn4Si2O7(OH)2 · H2O |
3 photos of Otavite associated with Caliche | |
3 photos of Otavite associated with Mimetite | Pb5(AsO4)3Cl |
Related Minerals - Strunz-mindat Grouping
5.AB.05 | Calcite | CaCO3 |
5.AB.05 | Gaspéite | NiCO3 |
5.AB.05 | Magnesite | MgCO3 |
5.AB.05 | Rhodochrosite | MnCO3 |
5.AB.05 | Siderite | FeCO3 |
5.AB.05 | Smithsonite | ZnCO3 |
5.AB.05 | Spherocobaltite | CoCO3 |
5.AB.05 va | Parakutnohorite | |
5.AB.10 | Ankerite | Ca(Fe2+,Mg)(CO3)2 |
5.AB.10 | Dolomite | CaMg(CO3)2 |
5.AB.10 | Kutnohorite | CaMn2+(CO3)2 |
5.AB.10 | Minrecordite | CaZn(CO3)2 |
5.AB.10 | Ć kĂĄchaite | CaCo(CO3)2 |
5.AB.15 | Aragonite | CaCO3 |
5.AB.15 | Cerussite | PbCO3 |
5.AB.15 | Strontianite | SrCO3 |
5.AB.15 | Witherite | BaCO3 |
5.AB.20 | Vaterite | CaCO3 |
5.AB.25 | Huntite | CaMg3(CO3)4 |
5.AB.30 | Norsethite | BaMg(CO3)2 |
5.AB.35 | Alstonite | BaCa(CO3)2 |
5.AB.40 | Olekminskite | Sr(Sr,Ca,Ba)(CO3)2 |
5.AB.40 | Paralstonite | BaCa(CO3)2 |
5.AB.45 | Barytocalcite | BaCa(CO3)2 |
5.AB.50 | Carbocernaite | (Ca,Na)(Sr,Ce,Ba)(CO3)2 |
5.AB.55 | Benstonite | Ba6Ca6Mg(CO3)13 |
5.AB.60 | Juangodoyite | Na2Cu(CO3)2 |
Other Information
Thermal Behaviour:
decomposes to CdO in the 603-648 K range; the unit cell parameter's behaviour is untypical, as it slightly increases up to 453 K, and then decreases.
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 Otavite
mindat.org URL:
https://www.mindat.org/min-3040.html
Please feel free to link to this page.
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References for Otavite
Localities for Otavite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
â - 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).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Australia | |
| Birch et al. (1997) |
| Hancock et al. (2007) |
| Downes et al. (2011) |
Bolivia | |
| Joy Desor analyses by SEM-EDS and Raman. |
| Cacho et al. (2019) |
China | |
| Tiegeng Liu et al. (2004) +2 other references |
| Minzhi Yang (2000) |
Czech Republic | |
| Sejkora |
Germany | |
| Schnorrer-Köhler (1988) |
Greece | |
| 90. +2 other references |
Hungary | |
| SzakĂĄll et al. (2016) |
Ireland | |
| Dr. David Green |
Italy | |
| Orlandi et al. (2005) |
| Binotto et al. (1988) |
| Domenico Saccardo (2019) |
Domenico Saccardo (2019) | |
Japan | |
| Takashi Yamada (2009) +1 other reference |
Namibia (TL) | |
| National Bureau of Standards (1957) |
North Macedonia | |
| Collection of NHM |
Russia | |
| M.I. Novgorodova |
Serbia | |
Slobodan A. RadosavljeviÄ et al. (2013) | |
| RadosavljeviÄ +3 other references |
UK | |
| Young +3 other references |
| Faithfull et al. (2001) |
| British Micromount Society +1 other reference |
USA | |
| Walstrom (n.d.) |
"The Accidental Pocket" talk presented ... | |
| Carlson et al. (2007) |
| Silver Coin Mine. Compact Disc. Paul ... |
| The Picking Table:28 (2) +1 other reference |
| Conti (2023) |
| M Massis collection |
Rocks & Minerals: 78 (6) | |
Vietnam | |
| Johan +3 other references |
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Su Elzu, Ozieri, Sassari Province, Sardinia, Italy