Nahpoite Mineral Data + 
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- 37.1.5.1 Nahpoite Na2HPO4 P 21/m,P 21 Mono
- VII/A.03-10 Nahpoite Na2HPO4 P 21/m,P 21 Mono
- VII/A.03-20 Olympite LiNa5(PO4)2 P 212121 2 2 2
- VII/A.03-30 Buchwaldite NaCaPO4 P mn21 mm2
General Nahpoite Information |
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 Chemical Formula: |
Na2HPO4 | ||
| Composition: |
Molecular Weight = 141.96 gm | ||
| Sodium 32.39 % Na 43.66 % Na2O | |||
| Phosphorus 21.82 % P 49.99 % P2O5 | |||
| Hydrogen 0.71 % H 6.35 % H2O | |||
| Oxygen 45.08 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Na2(HPO4) | ||
| IMA Status: |
Approved IMA 1981 | ||
| Locality: |
Big Fish River in northern Richarson Mountains, Yukon Territory, Canada. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for its composition (NaHPO-). | ||
| Synonym: |
ICSD 37142 | ||
| IMA1981-002 | |||
| PDF 35-735 | |||
Nahpoite Image | |||
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Images:
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Nahpoite Crystallography |
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| Axial Ratios: |
a:b:c =0.7997:1:0.7967 | ||
| Cell Dimensions: |
a = 5.47, b = 6.84, c = 5.45, Z = 2; beta = 116.33° V = 182.76 Den(Calc)= 2.58 | ||
| Crystal System: |
MonoclinicSpace Group: P 21/m,P 21 | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.803(1), 2.72(0.7), 3.84(0.55), | ||
Physical Properties of Nahpoite |
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| Color: |
White. | ||
| Density: |
2.58 | ||
| Habit: |
Microscopic Crystals - Crystals visible only with microscopes. | ||
| Hardness: |
1-2 - Between Talc and Gypsum | ||
| Luster: |
Earthy (Dull) | ||
| Streak: |
white | ||
Optical Properties of Nahpoite |
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| Gladstone-Dale: |
CI meas= 0.016 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.016 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1928,KPDmeas= 0.1928,KC= 0.196 |
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| Optical Data: |
Biaxial (?), a=1.49, g=1.505, bire=0.0150 | ||
Calculated Properties of Nahpoite |
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| Electron Density: |
relectron=2.54 gm/cc |
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| Fermion Index |
Fermion Index = 0.00021 Boson Index = 0.99979 |
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| Photoelectric: |
PENahpoite = 1.56 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Nahpoite is Not Radioactive |
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Nahpoite Classification |
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| Dana Class: |
37.1.5.1 (37)Anhydrous Acid Phosphates, etc | ||
| (37.1)with miscellaneous formulae | |||
| (37.1.5)Dana Group | |||
| Strunz Class: |
VII/A.03-10 VII - Phosphates, Arsenates and Vanadates | ||
| VII/A - Waterfree phosphates [PO4]3- without unfamiliar anions. cations of medium size: Mostly Fe, Mn | |||
| VII/A.03 - Nahpoite series | |||
Other Nahpoite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Nahpoite : 1 - Alkali-Nuts(English) 2 - Alkali-Nuts(Francais) 3 -Am. Min. Crystal Structure Database 4 -Athena 5 - EUROmin Project 6 -Google Images 7 -Google Scholar 8 -Handbook of Mineralogy (UofA) 9 -MinDAT 10 -MinMax(Deutsch) 11 -MinMax(English) 12 -Mineralienatlas (Deutsch) 13 -QUT Mineral Atlas 14 -École des Mines de Paris Search for Nahpoite using: Visit our Advertisers for Nahpoite : Translate Nahpoite Mineral Data : Ask about Nahpoite here : Print or Cut-and-Paste your Nahpoite Specimen Label here :
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