Teschemacherite
A valid IMA mineral species - grandfathered
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About Teschemacherite
Formula:
(NH4)HCO3
Colour:
Colourless, white, light yellow; colourless in transmitted light.
Hardness:
1½
Crystal System:
Orthorhombic
Name:
Named in honor of Frederick Edward Teschemacher (31 December 1791, Clarborough, Eastretford, Nottinghamshire, England - 10 January 1863, Highbury Park North, Middlesex, England), chemist who first described the mineral.
This page provides mineralogical data about Teschemacherite.
Unique Identifiers
Mindat ID:
3918
Long-form identifier:
mindat:1:1:3918:1
GUID
(UUID V4):
(UUID V4):
907a0f94-62e5-4ab8-ae7c-7838c00c7c30
IMA Classification of Teschemacherite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
(NH4)H(CO3)
Classification of Teschemacherite
5.AA.25
5 : CARBONATES (NITRATES)
A : Carbonates without additional anions, without H2O
A : Alkali carbonates
5 : CARBONATES (NITRATES)
A : Carbonates without additional anions, without H2O
A : Alkali carbonates
13.1.3.1
13 : ACID CARBONATES
1 : Miscellaneous
13 : ACID CARBONATES
1 : Miscellaneous
11.1.18
11 : Carbonates
1 : Carbonates of the alkali metals and ammonium
11 : Carbonates
1 : Carbonates of the alkali metals and ammonium
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Tmh | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Teschemacherite
Transparency:
Transparent
Colour:
Colourless, white, light yellow; colourless in transmitted light.
Hardness:
1½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
On {110}.
On {110}.
Optical Data of Teschemacherite
Type:
Biaxial (-)
RI values:
nα = 1.423 nβ = 1.536 nγ = 1.555
2V:
Measured: 41° , Calculated: 40°
Max Birefringence:
δ = 0.132
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:
Low
Dispersion:
relatively strong
Optical Extinction:
X = a; Y = b; Z = c.
Chemistry of Teschemacherite
Mindat Formula:
(NH4)HCO3
Elements listed:
Crystallography of Teschemacherite
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pccn
Setting:
Pccn
Cell Parameters:
a = 7.255 Å, b = 10.709 Å, c = 8.746 Å
Ratio:
a:b:c = 0.677 : 1 : 0.817
Unit Cell V:
679.51 ų (Calculated from Unit Cell)
Z:
8
Morphology:
Compact crystalline masses. Crystals short prismatic (artificial material).
Crystal Structure
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Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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CIF File Best | x | y | z | a | b | c
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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) |
---|---|---|---|---|---|---|---|
0015683 | Teschemacherite | Pertlik F (1981) Verfeinerung der kristallstruktur des teschemacherits, (NH4)CO2(OH) Tschermaks Mineralogische und Petrographische Mitteilungen 29 67-74 | 1981 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.998 Å | (100) |
5.34 Å | (60) |
3.62 Å | (55) |
4.05 Å | (45) |
3.005 Å | (45) |
3.068 Å | (30) |
2.1547 Å | (30) |
Comments:
Synthetic.
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere | <0.6 |
52 : Guano- and urine-derived minerals | <0.4 |
Type Occurrence of Teschemacherite
Place of Conservation of Type Material:
No designated type material.
Geological Setting of Type Material:
In a guano deposit.
Synonyms of Teschemacherite
Other Language Names for Teschemacherite
Related Minerals - Strunz-mindat Grouping
5.AA.05 | Zabuyelite | Li2CO3 |
5.AA.10 | Natrite | Na2CO3 |
5.AA.10 | Gregoryite | (Na2,K2,Ca)CO3 |
5.AA.15 | Nahcolite | NaHCO3 |
5.AA.20 | Kalicinite | KHCO3 |
5.AA.30 | Wegscheiderite | Na5H3(CO3)4 |
Other Information
Notes:
Slowly decomposes in humid atmosphere. Soluble in water. Soluble with effervescence in dilute acid.
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 Teschemacherite
mindat.org URL:
https://www.mindat.org/min-3918.html
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Please feel free to link to this page.
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References for Teschemacherite
Reference List:
Localities for Teschemacherite
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).
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.
Azerbaijan | |
Bolivia | |
| Camacho (2014) |
Chile | |
New Zealand | |
| Browne (1972) |
Peru | |
| Palache et al. (1951) |
| Palache et al. (1951) |
South Africa (TL) | |
| Palache et al. (1951) +1 other reference |
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North Chincha Island, Chincha Islands, San Clemente District, Pisco Province, Ica, Peru