Log In
Khurayyimite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Khurayyimite
Formula:
Ca7Zn4(Si2O7)2(OH)10 · 4H2O
Colour:
Colorless
Lustre:
Vitreous
Crystal System:
Monoclinic
Name:
Named after the type locality, Khurayyim Mount (Jabal al Khurayyim), Siwaqa pyrometamorphic rock area, Um Al-Rasas Sub-district, central Jordan.
New structure type.
Structure details:
* SiO4 and ZnO2(OH)2 tetrahedra forming (unusual) chains (loop-branched sechser single type, {lB, 11∞}[6Zn4Si4O21]) with Si–Si-Zn sequence;
* neighbouring silicate tetrahedra of the corrugated chains are bridged by additional ZnO2(OH)2 tetrahedra -→ 3-connected dreier rings;
* the chains are merged via clusters of five CaO6 and two CaO7 polyhedra.
The mineral is reported to "belong to the same group as vlasovite".
The two minerals can be described using geometrical repeat unit of cTr = 2T4 3T4 and topological repeat unit of cVr = 2V2 3V2.
Structure details:
* SiO4 and ZnO2(OH)2 tetrahedra forming (unusual) chains (loop-branched sechser single type, {lB, 11∞}[6Zn4Si4O21]) with Si–Si-Zn sequence;
* neighbouring silicate tetrahedra of the corrugated chains are bridged by additional ZnO2(OH)2 tetrahedra -→ 3-connected dreier rings;
* the chains are merged via clusters of five CaO6 and two CaO7 polyhedra.
The mineral is reported to "belong to the same group as vlasovite".
The two minerals can be described using geometrical repeat unit of cTr = 2T4 3T4 and topological repeat unit of cVr = 2V2 3V2.
Unique Identifiers
Mindat ID:
53413
Long-form identifier:
mindat:1:1:53413:2
IMA Classification of Khurayyimite
Approved
IMA Formula:
Ca7Zn2+4(Si2O7)2(OH)10·4H2O
Approval year:
2019
Classification of Khurayyimite
9.BK.05
9 : SILICATES (Germanates)
B : Sorosilicates
K : Unclassified sorosilicates
9 : SILICATES (Germanates)
B : Sorosilicates
K : Unclassified sorosilicates
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 |
|---|---|---|
| Khu | 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 Khurayyimite
Chemistry of Khurayyimite
Mindat Formula:
Ca7Zn4(Si2O7)2(OH)10 · 4H2O
Element Weights:
Crystallography of Khurayyimite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/c
Setting:
P21/c
Cell Parameters:
a = 11.2450(8) Å, b = 9.0963(5) Å, c = 14.068(1) Å
β = 113.237(8)°
β = 113.237(8)°
Ratio:
a:b:c = 1.236 : 1 : 1.547
Unit Cell V:
1,322.26 ų (Calculated from Unit Cell)
Z:
2
Comment:
by Synchrotron Single-Crystal X-ray Diffraction
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 10.311 Å | (81) |
| 5.455 Å | (59) |
| 3.833 Å | (100) |
| 3.408 Å | (42) |
| 3.215 Å | (34) |
| 2.952 Å | (67) |
| 2.908 Å | (55) |
| 2.661 Å | (57) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere | <0.6 |
| 51 : Pyrometamorphic minerals (see also #54 and #56) | <0.36 |
Type Occurrence of Khurayyimite
General Appearance of Type Material:
Spherulitic aggregates up to 200-300 μm in size. Individual elongated platy crystals in spherules are nearly 50 μm long and up to 10 μm thick.
Place of Conservation of Type Material:
Collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5298/1
Geological Setting of Type Material:
Small cavities and veins in altered spurrite marbles
Other Language Names for Khurayyimite
Dutch:Khurayyimiet
German:Khurayyimit
Common Associates
Associations Based on Photo Data:
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 Khurayyimite
mindat.org URL:
https://www.mindat.org/min-53413.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Khurayyimite
Localities for Khurayyimite
Showing 1 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.
Jordan (TL) | |
| Galuskina et al. (2019) +1 other reference |
Quick NavTopAbout KhurayyimiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence Other LanguagesCommon AssociatesOther InformationInternet Links References Localities Locality List
North Siwaqa complex, Daba-Siwaqa complex, Transjordan Plateau, Amman Governorate, Jordan