Feldspar (Orthoclase)

KAlSi3O8

Add one script tag to your page:

<div data-mineralfyi="entity" data-slug="feldspar-orthoclase"></div>
<script src="https://cdn.jsdelivr.net/npm/mineralfyi-embed@1/dist/embed.min.js" defer></script>

Embed as an iframe:

<iframe src="https://mineralfyi.com/iframe/entity/feldspar-orthoclase/?style=modern&theme=light" width="420" height="400" frameborder="0" loading="lazy" style="border:0;border-radius:10px;max-width:100%"></iframe>

Paste the URL in WordPress, Medium, or Ghost:

https://mineralfyi.com/zh-hans/mineral/feldspar-orthoclase/

Shields.io-compatible SVG badge:

Feldspar (Orthoclase) badge ![Feldspar (Orthoclase)](https://mineralfyi.com/badge/entity/feldspar-orthoclase.svg)

Web Component:

<mineralfyi-entity slug="feldspar-orthoclase"></mineralfyi-entity>
<script src="https://cdn.jsdelivr.net/npm/mineralfyi-embed@1/dist/embed.min.js" defer></script>

Orthoclase, a potassium feldspar with the formula KAlSi3O8, ranks among the most abundant minerals in the Earth's crust and is an essential component of granite and many other igneous rocks. It crystallizes in the monoclinic system as prismatic or tabular crystals, showing a vitreous luster, a white streak, and perfect {001} cleavage. Colors include white, pink, cream, and gray, with a Mohs hardness of 6 to 6.5 and a specific gravity between 2.55 and 2.63. Moonstone, valued for its floating adularescent sheen, is a gem variety of orthoclase. Its uneven to conchoidal fracture and two good cleavage directions are typical of the feldspar group.

Orthoclase是一种钾长石，是地壳中最常见的矿物之一。它是花岗岩和许多其他火成岩的基本组成矿物。月光石是Orthoclase的宝石变种。

晶系 Monoclinic
矿物分类 09 Silicates
莫氏硬度 6.0-6.5
比重 2.55-2.63
颜色 White, pink, cream, gray
光泽 Vitreous
条痕色 White
解理 Perfect {001}, good {010}
断口 Uneven to conchoidal
透明度 Translucent
晶体习性 Prismatic, tabular

莫氏硬度

Mohs Hardness: 6.0 – 6.5
1 Soft10 Hard
Feldspar (Orthoclase) has a Mohs hardness of 6–6.5 on the 1–10 mineral hardness scale.
莫氏硬度 Reference Mineral
1 Talc
2 Gypsum
3 Calcite
4 Fluorite
5 Apatite
6 Orthoclase
7 Quartz
8 Topaz
9 Corundum
10 Diamond

晶系

Monoclinic
Feldspar (Orthoclase) crystallizes in the Monoclinic crystal system.
特性 Value
晶系 Monoclinic
Axial Relationships a ≠ b ≠ c, α = γ = 90°, β ≠ 90°

Frequently Asked Questions

What is the hardness of Feldspar (Orthoclase)?
Feldspar (Orthoclase) has a Mohs hardness of 6.0-6.5.
What crystal system does Feldspar (Orthoclase) belong to?
Feldspar (Orthoclase) crystallizes in the Monoclinic crystal system.
What color is Feldspar (Orthoclase)?
Feldspar (Orthoclase) is typically White, pink, cream, gray.
What type of luster does Feldspar (Orthoclase) have?
Feldspar (Orthoclase) exhibits a Vitreous luster.
What is the chemical formula of Feldspar (Orthoclase)?
The chemical formula of Feldspar (Orthoclase) is KAlSi3O8.