Mineralogy Database

Teschemacherite Mineral Data

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General Teschemacherite Information

Help on Chemical  Formula: Chemical Formula: (NH4)HCO3
Help on Composition: Composition: Molecular Weight = 79.06 gm
   Hydrogen   5.10 %  H      -   % Calc as (NH4)2O
   Hydrogen   1.27 %  H    11.39 % H2O
   Carbon    15.19 %  C    55.67 % CO2
   Nitrogen  17.72 %  N    32.94 % (NH4)2O
   Oxygen    60.71 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: (NH4)(HCO3)
Help on Environment: Environment: Guano deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1868
Help on Locality: Locality: Undefined locality in Patagonia [probably in Argentina]. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Frederick Edward Teschemacher (1791-1863), English chemist, who first described the species.
Help on Name Pronunciation: Name Pronunciation: Teschemacherite + Pronunciation Say TESCHEMACHERITE
Help on Synonym: Synonym: ICSD 100877
  PDF 9-415

Teschemacherite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6774:1:0.8166
Help on Cell Dimensions: Cell Dimensions: a = 7.255, b = 10.709, c = 8.746, Z = 8; V = 679.51 Den(Calc)= 1.55
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pccn
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3(1), 5.34(0.6), 3.62(0.55),

Physical Properties of Teschemacherite

Help on Cleavage: Cleavage: {110} Perfect
Help on Color: Color: Colorless, Yellowish, White, Light yellow.
Help on Density: Density: 1.58
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Hardness: Hardness: 1.5 - Between Talc and Gypsum
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Teschemacherite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -1.043 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -1.083 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.3254,KPDmeas= 0.3192,KC= 0.1562
Ncalc = 1.24 - 1.25
Help on Optical Data: Optical Data: Biaxial (-), a=1.4227, b=1.5358, g=1.5545, bire=0.1318, 2V(Calc)=40, 2V(Meas)=41.633.

Calculated Properties of Teschemacherite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.68 gm/cc
note: Specific Gravity of Teschemacherite =1.58 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.17
Boson Index = 0.83
Help on Photoelectric: Photoelectric: PETeschemacherite = 0.32 barns/electron
U=PETeschemacherite x rElectron Density= 0.54 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Teschemacherite is Not Radioactive

Teschemacherite Classification

Help on  Dana Class: Dana Class: (13)Acid Carbonates
  (13.01)with miscellaneous formulae
  (13.01.03)Dana Group Teschemacherite (NH4)HCO3 Pccn 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 05.AA.25 05 - CARBONATES (NITRATES)
  05.A - Carbonates without additional anions, without H2O
  05.AA -Alkali Carbonates
05.AA.25 Teschemacherite (NH4)HCO3 Pccn 2/m 2/m 2/m

Other Teschemacherite Information

Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Teschemacherite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 05.AA.25





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