Trona Mineral Data

Advertisment

Our Mission is Simple: RMS will be the go-to portal for all Mineral, Gem and Rock shows in the USA

General Trona Information

Chemical Formula:

Na3(CO3)(HCO3)•2(H2O)

Composition:

Molecular Weight = 226.03 gm

Sodium 30.51 % Na 41.13 % Na₂O

Hydrogen 2.23 % H 19.93 % H₂O

Carbon 10.63 % C 38.94 % CO₂

Oxygen 56.63 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₃(HCO₃)(CO₃)•2(H₂O)

Environment:

Non-marine evaporite deposits.

IMA Status:

Valid Species (Pre-IMA) 1773

Locality:

Nile Vally near Memphis, Egypt. Link to MinDat.org Location Data.

Name Origin:

From Arabic origins meaning "natron."

Name Pronunciation:

Trona

Synonym:

ICSD 62200

PDF 29-1447

Urao

Trona Image

Images:

Trona Nahcolite

Comments: Massive, coarse-grained Trona from a drill core of the upper mixed-layer Saltbed. White areas are nahcolite alteration.
Location: Searles Lake, San Bernardino County, California, USA. Scale: 12 x 15 cm.
© Dave Barthelmy

Trona Crystallography

Axial Ratios:

a:b:c =5.7577:1:2.9504

Cell Dimensions:

a = 20.106, b = 3.492, c = 10.303, Z = 4; beta = 103.05° V = 704.69 Den(Calc)= 2.13

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: I2/a

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.647(1), 3.071(0.8), 4.892(0.55),

Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above

Forms: ( 1 1 1) ( 1 0 0) ( 0 0 1)

Warning: this large pop-up is very compute intensive and may not work well with some computers.

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Choi C S , Mighell A D , Acta Crystallographica, Section B , 38 (1982) p.2874-2876, Neutron diffraction study of sodium sesquicarbonate dihydrate, Note: H3 disordered model, this is the prefered model

View Additional jPOWD Structure files for Trona
[1]

Physical Properties of Trona

Cleavage:

{100} Perfect, {111} Indistinct, {001} Indistinct

Color:

Colorless, Gray white, Grayish, Yellowish, Yellowish white.

Density:

2.11 - 2.17, Average = 2.13

Diaphaneity:

Translucent

Fracture:

Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.

Habit:

Columnar - Forms columns

Habit:

Fibrous - Crystals made up of fibers.

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Hardness:

2.5 - Finger Nail

Luminescence:

Fluorescent and Phosphorescent, Short UV=blue-white yellow-orange, Long UV=bright blue white yellow-orange.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Trona

Gladstone-Dale:

CI meas= 0.014 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.009 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.226,KPDmeas= 0.2249,KC= 0.2281
Ncalc = 1.48 - 1.49

Optical Data:

Biaxial (-), a=1.412, b=1.492, g=1.54, bire=0.1280, 2V(Calc)=70, 2V(Meas)=72. Dispersion relatively strong.

Calculated Properties of Trona

Electron Density:

Bulk Density (Electron Density)=2.15 gm/cc
note: Specific Gravity of Trona =2.13 gm/cc.

Fermion Index:

Fermion Index = 0.0014442381
Boson Index = 0.9985557619

Photoelectric:

PE_Trona= 0.67 barns/electron
U=PE_Trona x rElectron Density= 1.45 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Trona is Not Radioactive

Trona Classification

Dana Class:

13.01.04.01 (13)Acid Carbonates

(13.01)with miscellaneous formulae

(13.01.04)Dana Group

13.01.04.01 Trona Na3(CO3)(HCO3)•2(H2O) I2/a 2/m

Strunz Class:

05.CB.15 05 - CARBONATES (NITRATES)

05.C - Carbonates without Additional Anions, with H2O

05.CB -With large cations (alkali and alkali-earth carbonates)

05.CB.15 Trona Na3(CO3)(HCO3)•2(H2O) I2/a 2/m

Other Trona Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Collectors Book of Fluorescent Minerals) OPTIC PROP.(Ford32)

See Also:

Links to other databases for Trona :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Athena
6 - EUROmin Project
7 - Ecole des Mines de Paris
8 - GeoScienceWorld
9 - Google Images
10 - Google Scholar
11 - Handbook of Mineralogy (MinSocAm)
12 - Handbook of Mineralogy (UofA)
13 - MinDAT
14 - Mineralienatlas (Deutsch)
15 - Online Mineral Museum
16 - Philatelic Mineralogy
17 - QUT Mineral Atlas
18 - Ruff.Info

Search for Trona using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Trona :

A Bijoux Google Search for Trona
Adam's Minerals Google Search for Trona
Cape Minerals Google Search for Trona
Dakota Matrix Minerals Google Search for Trona
Excalibur Mineral Corp. Google Search for Trona
Exceptional Minerals Google Search for Trona
John Betts Fine Minerals Search for Trona
McDougall Minerals Google Search for Trona
Mineral News Website Link
Rock and Mineral Shows Google Search for Trona
Weinrich Minerals, Inc. Google Search for Trona

Ask about Trona here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Trona Specimen Label here :

Trona

Na3(CO3)(HCO3)•2(H2O)
Dana No: 13.01.04.01 Strunz No: 05.CB.15
Locality:

Notes: