Shortite Mineral Data (original) (raw)
General Shortite Information
Chemical Formula:
Na2Ca2(CO3)3
Composition:
Molecular Weight = 306.16 gm
Sodium 15.02 % Na 20.24 % Na2O
Calcium 26.18 % Ca 36.63 % CaO
Carbon 11.77 % C 43.12 % CO2
Oxygen 47.03 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Na2Ca2(CO3)3
Environment:
Associated with trona.
IMA Status:
Valid Species (Pre-IMA) 1940
Locality:
Drill cores from the Green River formation, Wyoming and Utah. Link to MinDat.org Location Data.
Name Origin:
Named for Maxwell Naylor Short (1889-1952), professor of mineralogy, University of Arizona.
Name Pronunciation:
Shortite 
Synonym:
ICSD 16495
PDF 21-1348
Shortite Image
Images:
Images:
 |
Shortite Comments: Triangular shortite crystal in kerogenaceous dolomitic marlstone from the saline zone in the Green River Formation. Location: Green River, Sweetwater Co., Wyoming, USA.Scale: Crystal Size 2 mm. © Tom Loomis / Dakota Matrix |
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Shortite Crystallography
Axial Ratios:
a:b:c =0.4497:1:0.6455
Cell Dimensions:
a = 4.961, b = 11.03, c = 7.12, Z = 2; V = 389.61 Den(Calc)= 2.61
Crystal System:
Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: Amm2
X Ray Diffraction:
By Intensity(I/Io): 2.562(1), 4.96(0.7), 5.52(0.7),
Forms:
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| | Forms:( 0 1 0) ( 0 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:
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| | Dickens B , Hyman A , Brown W E , Journal of Research of the National Bureau of Standards - Physics and Chemistry , 75A (1971) p.129-135, Crystal structure of Ca2Na2(CO3)3 (shortite), Note: Y- and z-coordinates of Ca adjusted to match reported bond lengths | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
Physical Properties of Shortite
Cleavage:
{010} Distinct
Color:
Colorless, Light yellow.
Density:
2.6
Diaphaneity:
Transparent
Fracture:
Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Habit:
Tabular - Form dimensions are thin in one direction.
Hardness:
3 - Calcite
Luminescence:
Fluorescent, Short UV=amber, Long UV=amber.
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Shortite
Gladstone-Dale:
CI meas= -0.029 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.025 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2115,KPDmeas= 0.2123,KC= 0.2064
Ncalc = 1.54
Optical Data:
Biaxial (-), a=1.531, b=1.555, g=1.57, bire=0.0390, 2V(Calc)=74, 2V(Meas)=75. Dispersion r < v moderate.
Pleochroism (x):
colorless.
Pleochroism (y):
colorless.
Pleochroism (z):
colorless.
Calculated Properties of Shortite
Electron Density:
Bulk Density (Electron Density)=2.59 gm/cc
note: Specific Gravity of Shortite =2.61 gm/cc.
Fermion Index:
Fermion Index = 0.0018738082
Boson Index = 0.9981261918
Photoelectric:
PEShortite = 3.61 barns/electron
U=PEShortite x rElectron Density= 9.35 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Shortite is Not Radioactive
Shortite Classification
Dana Class:
14.04.01.01 (14)Anhydrous Carbonates
(14.04)with Compound Formula A+2 B++2 (CO3)4
(14.04.01)Dana Group
14.04.01.01 Shortite Na2Ca2(CO3)3 Amm2 mm2
Strunz Class:
05.AC.25 05 - CARBONATES (NITRATES)
05.A - Carbonates without additional anions, without H2O
05.AC -Alkali and alkali-earth carbonates
05.AC.25 Shortite Na2Ca2(CO3)3 Amm2 mm2
Other Shortite Information
References:
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990;Dana8) OPTIC PROP.(Dana8)
See Also:
Links to other databases for Shortite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - WWW-MINCRYST
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Ask about Shortite here :
Ask-A-Mineralogist from the Mineralogical Society of America
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Rockhounds Discussion Group on Yahoo Groups
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Print or Cut-and-Paste your Shortite Specimen Label here :
Shortite
Na2Ca2(CO3)3
Dana No: 14.04.01.01 Strunz No: 05.AC.25
Locality:
Notes: