Parascholzite
A valid IMA mineral species
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About Parascholzite
Formula:
CaZn2(PO4)2 · 2H2O
Colour:
Colourless to white
Lustre:
Vitreous
Hardness:
4
Specific Gravity:
3.12
Crystal System:
Monoclinic
Name:
Named from the Greek 'para' for near, and scholzite, for the polymorphic relationship to that mineral.
Type Locality:
Dimorph of:
This page provides mineralogical data about Parascholzite.
Unique Identifiers
Mindat ID:
3111
Long-form identifier:
mindat:1:1:3111:6
IMA Classification of Parascholzite
Approved
IMA Formula:
CaZn2+2(PO4)2(H2O)2
Approval year:
1980
First published:
1981
Classification of Parascholzite
8.CA.45
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
A : With small and large/medium cations
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
A : With small and large/medium cations
40.2.5.1
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2 : AB2(XO4)2·xH2O
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2 : AB2(XO4)2·xH2O
19.6.8
19 : Phosphates
6 : Phosphates of Zn
19 : Phosphates
6 : Phosphates of Zn
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Pslz | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Parascholzite
Vitreous
Transparency:
Translucent
Colour:
Colourless to white
Streak:
White
Hardness:
4 on Mohs scale
Parting:
The composition plane of polysynthetic twins is a parting surface.
Density:
3.12(3) g/cm3 (Measured) 3.10 g/cm3 (Calculated)
Optical Data of Parascholzite
Type:
Biaxial (+)
RI values:
nα = 1.587(2) nβ = 1.588(2) nγ = 1.603(2)
2V:
Measured: 25° (2), Calculated: 29°
Max. Birefringence:
δ = 0.016
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Moderate
Dispersion:
r > v
Chemistry of Parascholzite
Mindat Formula:
CaZn2(PO4)2 · 2H2O
Element Weights:
Crystallography of Parascholzite
Crystal System:
Monoclinic
Cell Parameters:
a = 17.864(5) Å, b = 7.422(2) Å, c = 6.674(2) Å
β = 106.45(1)°
β = 106.45(1)°
Ratio:
a:b:c = 2.407 : 1 : 0.899
Unit Cell V:
848.66 ų (Calculated from Unit Cell)
Z:
4
Twinning:
By reflection on {100}, also the composition plane; may be simple, but typically polysynthetic.
Comment:
Point Group: 2/m or m.; Space Group: C2/c or Cc.
Crystal Structure
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2x2x2 | 3x3x3 | 4x4x4
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0011012 | Parascholzite | Taxer K J (1992) Order-disorder and polymorphism of the compound with the composition of scholzite, CaZn2[PO4]2*2H2O Zeitschrift fur Kristallographie 198 239-253 |  | 1992 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 8.55 Å | (100) |
| 2.804 Å | (80) |
| 4.158 Å | (50) |
| 3.406 Å | (40) |
| 2.779 Å | (40) |
| 4.53 Å | (30) |
| 2.586 Å | (30) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 22 : Hydration and low-? subsurface aqueous alteration (see also #23) |
Type Occurrence of Parascholzite
Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, B14318, B14345.
Associated Minerals at Type Locality:
Synonyms of Parascholzite
Other Language Names for Parascholzite
Common Associates
Associations Based on Photo Data:
| 7 photos of Parascholzite associated with Scholzite | CaZn2(PO4)2 · 2H2O |
| 4 photos of Parascholzite associated with Tarbuttite | Zn2(PO4)(OH) |
| 2 photos of Parascholzite associated with Ehrleite | Ca4Be3Zn2(PO4)6 · 9H2O |
| 1 photo of Parascholzite associated with Kingsmountite | Ca3Mn2+FeAl4(PO4)6(OH)4 · 12H2O |
| 1 photo of Parascholzite associated with Hopeite | ZnZn2(PO4)2 · 4H2O |
| 1 photo of Parascholzite associated with Phosphophyllite | Zn2Fe 2+(PO4)2 · 4H2O |
| 1 photo of Parascholzite associated with Fairfieldite | Ca2Mn2+(PO4)2 · 2H2O |
Related Minerals - Strunz-mindat Grouping
| 8.CA. | Apexite | NaMg(PO4) · 9H2O |
| 8.CA. | Brandãoite | BeAl2(PO4)2(OH)2(H2O)5 |
| 8.CA. | Davidlloydite | Zn3(AsO4)2 · 4H2O |
| 8.CA.05 | Parafransoletite | Ca3Be2(PO4)2(PO3OH)2 · 4H2O |
| 8.CA.05 | Fransoletite | Ca3Be2(PO4)2(PO3OH)2 · 4H2O |
| 8.CA.10 | Ehrleite | Ca4Be3Zn2(PO4)6 · 9H2O |
| 8.CA.15 | Faheyite | Be2Mn2+Fe3+2(PO4)4 · 6H2O |
| 8.CA.20 | Mccrillisite | NaCs(Be,Li)Zr2(PO4)4 · 1-2H2O |
| 8.CA.20 | Gainesite | Na(Na,K)(Be,Li)Zr2(PO4)4 · 1.5-2H2O |
| 8.CA.20 | Selwynite | NaK(Be,Al)Zr2(PO4)4 · 2H2O |
| 8.CA.25 | Pahasapaite | Li8(Ca,Li,K)10.5Be24(PO4)24 · 38H2O |
| 8.CA.30 | Nizamoffite | Mn2+Zn2(PO4)2(H2O)4 |
| 8.CA.30 | Arsenohopeite | Zn3(AsO4)2 · 4H2O |
| 8.CA.30 | Hopeite | ZnZn2(PO4)2 · 4H2O |
| 8.CA.35 | Warikahnite | Zn3(AsO4)2 · 2H2O |
| 8.CA.40 | Phosphophyllite | Zn2Fe 2+(PO4)2 · 4H2O |
| 8.CA.42 | Steinmetzite | Zn2Fe3+(PO4)2(OH) · 3H2O |
| 8.CA.45 | Scholzite | CaZn2(PO4)2 · 2H2O |
| 8.CA.50 | Keyite | Cu2+3Zn4Cd2(AsO4)6 · 2H2O |
| 8.CA.55 | Pushcharovskite | K0.6Cu18[AsO2(OH)2]4[AsO3OH]10(AsO4)(OH)9.6 · 18.6H2O |
| 8.CA.60 | Prosperite | Ca2Zn4(AsO4)4 · H2O |
| 8.CA.65 | Gengenbachite | KFe3+3(PO3OH)4[PO2(OH)2]2 · 6H2O |
| 8.CA.70 | Parahopeite | Zn3(PO4)2 · 4H2O |
| 8.CA.70 | Reaphookhillite | MgZn2(PO4)2 · 4H2O |
| 8.CA.75 | Stergiouite | CaZn2(AsO4)2 · 4H2O |
| 8.CA.80 | Limousinite | BaCa[Be4P4O16] · 6H2O |
| 8.CA.85 | Minjiangite | BaBe2(PO4)2 |
| 8.CA.85 | Wilancookite | (Ba5Li2◻)Ba6Be24P24O96 · 26H2O |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Parascholzite
mindat.org URL:
https://www.mindat.org/min-3111.html
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References for Parascholzite
Reference List:
Sturman, B. Darko, Rouse, Roland C., Dunn, Pete J. (1981) Parascholzite, a new mineral from Hagendorf, Bavaria, and its relationship to scholzite. American Mineralogist, 66 (7-8) 843-851
Taxer, Karlheinz (1992) Order-disorder and polymorphism of the compound with the composition of scholzite, CaZn2[PO4]2· 2H2O. Zeitschrift für Kristallographie, 198 (3). 239-255 doi:10.1524/zkri.1992.198.3-4.239
Localities for Parascholzite
Showing 14 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Australia | |
| Gallasch (2026) |
Belgium | |
| Blondieau et al. (2016) |
Europe | |
| Berbain et al. (2012) | |
France | |
| Berbain et al. (2012) |
Germany | |
| Dill et al. (2013) |
| [Amer.Min. (1981) +2 other references | |
| Bender et al. (1994) |
Japan | |
| Yamada (2004) |
Russia | |
| Lykova I. S. et al. (2017) |
Spain | |
| Joan Abella i Creus (2008) |
USA | |
| Whitmore et al. (2004) +2 other references |
| Jason B. Smith collection +1 other reference |
| Rocks & Minerals: 60: 117. +1 other reference |
Zambia | |
| Joe Cilen +1 other reference |
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Palermo No. 1 Mine, Groton, Grafton County, New Hampshire, USA