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Nacaphite Mineral Data |
General Nacaphite Information |
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Na(Na,Ca)2(PO4)F | ||
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Molecular Weight = 194.90 gm | ||
Sodium 27.13 % Na 36.57 % Na2O | |||
Calcium 14.39 % Ca 20.14 % CaO | |||
Phosphorus 15.89 % P 36.41 % P2O5 | |||
Oxygen 32.84 % O | |||
Fluorine 9.75 % F 9.75 % F | |||
- % F -4.10 % -O=F2 | |||
______ ______ | |||
100.00 % 98.77 % = TOTAL OXIDE | |||
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Na2.3Ca0.7(PO4)F | ||
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Hydrothermal assemblages. | ||
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Approved IMA 1980 | ||
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Khibiny alkaline massif, Russia. Link to MinDat.org Location Data. | ||
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Named after the composition (NaCa, Phosphate). | ||
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Nacaphite + Pronunciation ![]() |
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ICSD 51234 | ||
PDF 33-1222 | |||
Nacaphite Image | |||
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Nacaphite Crystallography |
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a:b:c =0.436:1:0.2905 | ||
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a = 10.65, b = 24.425, c = 7.097, Z = 16; alpha = 89.99°, beta = 89.998°, gamma = 90.04° V = 1,846.12 Den(Calc)= 2.80 | ||
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Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1 | ||
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By Intensity(I/Io): 2.649(1), 3.054(0.45), 3.049(0.4), | ||
Physical Properties of Nacaphite |
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None | ||
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Colorless, White. | ||
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2.85 | ||
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Transparent | ||
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Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz). | ||
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3 - Calcite | ||
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Vitreous (Glassy) | ||
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white | ||
Optical Properties of Nacaphite |
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CI meas= -0.015 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= -0.033 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.189,KPDmeas= 0.1857,KC= 0.183 Ncalc = 1.51 - 1.52 |
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Biaxial (-), a=1.524, b=1.528, g=1.536, bire=0.0120, 2V(Calc)=72, 2V(Meas)=65. | ||
Calculated Properties of Nacaphite |
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Bulk Density (Electron Density)=2.79 gm/cc note: Specific Gravity of Nacaphite =2.85 gm/cc. |
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Fermion Index = 0.0003519357 Boson Index = 0.9996480643 |
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PENacaphite = 3.03 barns/electron U=PENacaphite x rElectron Density= 8.45 barns/cc. |
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GRapi = 0 (Gamma Ray American Petroleum Institute Units) Nacaphite is Not Radioactive |
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Nacaphite Classification |
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41.03.06.01 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen | ||
(41.03)where (A B)3 (XO4) Zq | |||
(41.03.06)Dana Group | |||
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08.BO.05 08 - PHOSPHATES, ARSENATES, VANADATES | ||
08.B - Phosphates, etc. with Additional Anions, without H2O | |||
08.BO -With only large cations, (OH, etc.):RO4 � 1:1 | |||
Other Nacaphite Information |
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NAME( Dana8) PHYS. PROP.(Dana8, AmMin v93:706) OPTIC PROP.(AmMin, v93:706) | ||
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Links to other databases for Nacaphite : 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 - MinDAT 10 - Mineralienatlas (Deutsch) 11 - Online Mineral Museum 12 - QUT Mineral Atlas 13 - Ruff.Info Search for Nacaphite using: Visit our Advertisers for Nacaphite : Ask about Nacaphite here : Print or Cut-and-Paste your Nacaphite Specimen Label here :
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