Niahite Mineral Data + 
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- 40.1.2.1 Dittmarite (NH4)Mg(PO4)·(H2O) P mn21 mm2
- 40.1.2.2 Niahite (NH4)(Mn,Mg,Ca)PO4·(H2O) P mn21 mm2
- VII/C.23-10 Struvite (NH4)MgPO4·6(H2O) P mn21 mm2
- VII/C.23-20 Dittmarite (NH4)Mg(PO4)·(H2O) P mn21 mm2
- VII/C.23-30 Niahite (NH4)(Mn,Mg,Ca)PO4·(H2O) P mn21 mm2
- VII/C.23-40 Hannayite (NH4)2Mg3H4(PO4)4·8(H2O) P1 1
- VII/C.23-50 Schertelite (NH4)2MgH2(PO4)2·4(H2O) P bca 2/m 2/m 2/m
- VII/C.23-60 Stercorite H(NH4)Na(PO4)·4(H2O) P1 1
- VII/C.23-65 Swaknoite (NH4)2Ca(HPO4)2·(H2O) Unk Ortho
- VII/C.23-70 Mundrabillaite (NH4)2Ca(HPO4)2·(H2O) Pm,P 2,P 2/m Mono
General Niahite Information |
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 Chemical Formula: |
(NH4)(Mn++,Mg,Ca)PO4·(H2O) | ||
| Composition: |
Molecular Weight = 180.15 gm | ||
| Calcium 2.22 % Ca 3.11 % CaO | |||
| Magnesium 2.70 % Mg 4.47 % MgO | |||
| Manganese 21.35 % Mn 27.56 % MnO | |||
| Phosphorus 17.19 % P 39.40 % P2O5 | |||
| Hydrogen 2.01 % H - % Calc as (NH4)2O | |||
| Hydrogen 1.34 % H 12.00 % H2O | |||
| Nitrogen 7.00 % N 13.01 % (NH4)2O | |||
| Oxygen 46.18 % O | |||
| ______ ______ | |||
| 100.00 % 99.56 % = TOTAL OXIDE | |||
| Empirical Formula: |
(NH4)0.9Mn2+0.7Mg0.2Ca0.1(PO4)·1.2(H2O) | ||
| Environment: |
Derived from the breakdown of bat guano. | ||
| IMA Status: |
Approved IMA 1983 | ||
| Locality: |
Niah Great Cave, Sarawak, Malaysia. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for the locality. | ||
Search for Niahite Images | |||
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Images:
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Niahite Crystallography |
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| Axial Ratios: |
a:b:c =0.6469:1:0.5558 | ||
| Cell Dimensions: |
a = 5.68, b = 8.78, c = 4.88, Z = 2; V = 243.37 Den(Calc)= 2.46 | ||
| Crystal System: |
Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: P mn21 | ||
| X Ray Diffraction: |
By Intensity(I/Io): 8.82(1), 2.832(0.9), 2.845(0.8), | ||
Physical Properties of Niahite |
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| Color: |
Light orange, Colorless. | ||
| Density: |
2.39 | ||
| Diaphaniety: |
Transparent | ||
| Habit: |
Aggregates - Made of numerous individual crystals or clusters. | ||
| Habit: |
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite) | ||
| Hardness: |
1-2 - Between Talc and Gypsum | ||
| Streak: |
white | ||
Optical Properties of Niahite |
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| Gladstone-Dale: |
CI meas= -0.37 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= -0.331 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2432,KPDmeas= 0.2503,KC= 0.1827 |
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| Optical Data: |
Biaxial (-), a=1.582, b=1.604, g=1.609, bire=0.0270, 2V(Calc)=50, 2V(Meas)=54. | ||
Calculated Properties of Niahite |
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| Electron Density: |
relectron=2.48 gm/cc |
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| Fermion Index |
Fermion Index = 0.07267 Boson Index = 0.92733 |
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| Photoelectric: |
PENiahite = 6.44 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Niahite is Not Radioactive |
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Niahite Classification |
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| Dana Class: |
40.1.2.2 (40)Hydrated Phosphates, etc | ||
| (40.1)where A++ B++ (XO4) · x(H2O) | |||
| (40.1.2)Dana Group | |||
| Strunz Class: |
VII/C.23-30 VII - Phosphates, Arsenates and Vanadates | ||
| VII/C - Water-bearing phosphates without unfamiliar anions, cations of medium and big size: Fe, Mn, Zn, Mg and Ca, (NH4)1+ | |||
| VII/C.23 - Struvite - Mundrabillaite series | |||
Other Niahite Information |
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| References: |
NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Niahite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 - Franklin Minerals(Dunn) 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris Search for Niahite using: Visit our Advertisers for Niahite : AA Mineral SpecimensB & L Fine Minerals Crystal Vaults Dan Weinrich Fine Minerals Dan Weinrich Auctions e-Rocks Auctions Excalibur Minerals Exceptional Minerals Fabre Minerals Greenside Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club MineralsWeb Fine Minerals Rockshop.cz T G Fine Minerals Wrights Rock Shop Translate Niahite Mineral Data : Ask about Niahite here : Print or Cut-and-Paste your Niahite Specimen Label here :
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